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A202985 Number of nX5 0..2 arrays with every nonzero element less than or equal to some NW, E or S neighbor 1
1, 1629, 239196, 21925060, 2075667829, 206497187067, 20459663726506, 2017022464973722, 198969490156936990, 19637218789520939864, 1937911065006945647691, 191234680281406201922396 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 5 of A202988
LINKS
FORMULA
Empirical: a(n) = 243*a(n-1) -25352*a(n-2) +1737258*a(n-3) -92930407*a(n-4) +4050740583*a(n-5) -146062716621*a(n-6) +4448155297186*a(n-7) -115379281162529*a(n-8) +2547291066160289*a(n-9) -48114884171590300*a(n-10) +784545411418052203*a(n-11) -11098014286511961509*a(n-12) +136316949577100648610*a(n-13) -1449454743058868096467*a(n-14) +13160178047768321060430*a(n-15) -98276626153055770698597*a(n-16) +541139796859632030076293*a(n-17) -1125740706748938759324366*a(n-18) -20305535642226597346940013*a(n-19) +359802437643339753298784820*a(n-20) -3725359881987845095927281731*a(n-21) +29545610418979598958234127273*a(n-22) -188490783462523209200984359614*a(n-23) +945262150997484649994026915975*a(n-24) -3225059964464059751080880305607*a(n-25) +794269616196981694942239140964*a(n-26) +98526272983610712158538893108094*a(n-27) -1012224198461906853209280884049377*a(n-28) +7026904585650826331338782484069102*a(n-29) -39433803756137689288895641751903824*a(n-30) +187914911664199930132612124395450175*a(n-31) -769626298258862694839696303696109130*a(n-32) +2682229028737136319222479273333024140*a(n-33) -7640216012321468906137324200135830922*a(n-34) +15671464354422182891909270039514692485*a(n-35) -9580901114588509186377406212047948528*a(n-36) -99301196204807930852469087925076981110*a(n-37) +594050804645527504270942836603398034836*a(n-38) -2061721283708107173243359856864403857392*a(n-39) +4887094690460669682984756183451746937128*a(n-40) -6216367815571309679454150805543425659164*a(n-41) -9333813100587616380082491412010676273568*a(n-42) +88572750841543374506003667229906600867036*a(n-43) -331921080904198987051037243969881765161992*a(n-44) +885857501031037933137845732452320523645072*a(n-45) -1844328105671679449159528318820890091083120*a(n-46) +3031170308131963254098062925914649303087312*a(n-47) -3775868843980240354054896995779926184297408*a(n-48) +2934858128644825687204367621296520436581136*a(n-49) +643224261461651970400460847417021752619840*a(n-50) -7288602583026988230464950036881637461159680*a(n-51) +15787546573696067420494153608115808943468288*a(n-52) -23495537877374918574123513317397564938843264*a(n-53) +27590642483664183485149277657734734286000896*a(n-54) -26667091311558284285595827275557331487500544*a(n-55) +21471809066295043072613373790932356779434496*a(n-56) -14434612308764363766131917249616673879469824*a(n-57) +8304221840195541593170562199039420408663040*a(n-58) -4531747763357383319169023378692929669095424*a(n-59) +2712465214815411751874035456992815434493952*a(n-60) -1695834236417844157019230159366414466998272*a(n-61) +890859018072189057968896993501289065562112*a(n-62) -327603957604069571174300686562043094302720*a(n-63) +66146072220534495671731270834725818400768*a(n-64) +2550396145625714667281304399545562365952*a(n-65) -6186289102816910925528249779903507988480*a(n-66) +1866917769190202688947858760828715008000*a(n-67) -223812289871617347674663876579819520000*a(n-68) -5701644090594291666915824762880000000*a(n-69) +2857350328506431605489375641600000000*a(n-70) -303839226521031184220160000000000*a(n-71) for n>72
EXAMPLE
Some solutions for n=2
..0..0..1..2..0....0..1..2..2..0....2..2..2..1..1....0..1..0..2..2
..1..1..2..2..2....0..1..1..2..1....2..2..2..1..1....1..1..2..2..2
CROSSREFS
Sequence in context: A198510 A241493 A328452 * A063891 A254849 A237923
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 26 2011
STATUS
approved

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Last modified June 2 08:51 EDT 2024. Contains 373033 sequences. (Running on oeis4.)