login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A198664 Number of nX3 0..4 arrays with values 0..4 introduced in row major order and each element equal to one or two horizontal and vertical neighbors 1
1, 13, 132, 2715, 59281, 1544783, 40546053, 1100262051, 29830418147, 813591963761, 22176955780999, 605153141144795, 16510148540966104, 450529856078844767, 12293523860930239681, 335463844113052677850 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 3 of A198669
LINKS
FORMULA
Empirical: a(n) = 26*a(n-1) +207*a(n-2) -4693*a(n-3) -5776*a(n-4) +157591*a(n-5) +139443*a(n-6) -1825139*a(n-7) -3912555*a(n-8) +9205948*a(n-9) +49540346*a(n-10) -50523258*a(n-11) -187400427*a(n-12) +193241548*a(n-13) +457708054*a(n-14) -2348260717*a(n-15) -853094525*a(n-16) +19413615836*a(n-17) -4559327195*a(n-18) -81422778316*a(n-19) +29945338304*a(n-20) +301610165665*a(n-21) -167143208735*a(n-22) -816553663024*a(n-23) +863486594864*a(n-24) +360655337798*a(n-25) -4549562921429*a(n-26) +2936432568750*a(n-27) +19962871586477*a(n-28) -6710978972167*a(n-29) -45546401098564*a(n-30) +12779999633307*a(n-31) +41720387693559*a(n-32) -36287192385505*a(n-33) +1527013277477*a(n-34) +152317108173902*a(n-35) +35931632692232*a(n-36) -236911335057032*a(n-37) -134246505542044*a(n-38) -202262924273384*a(n-39) -284614527001184*a(n-40) +24380741738928*a(n-41) +465170070212768*a(n-42) +610398531322432*a(n-43) +205669857696256*a(n-44) +965878890074624*a(n-45) -10768073967104*a(n-46) +541791030492160*a(n-47) +1703742317537280*a(n-48) -974079293448192*a(n-49) -101946236010496*a(n-50) -762059395989504*a(n-51) -2488636072656896*a(n-52) -986411874910208*a(n-53) -226783416811520*a(n-54) -358318577025024*a(n-55) +403639919181824*a(n-56) +362849171931136*a(n-57) +64276333068288*a(n-58) -22574348107776*a(n-59) -14843406974976*a(n-60) for n>61
EXAMPLE
Some solutions with all values 0 to 4 for n=4
..0..1..1....0..1..2....0..1..1....0..0..1....0..0..0....0..1..2....0..1..1
..0..2..2....0..1..2....0..2..2....2..2..1....1..2..2....0..1..2....0..0..2
..3..3..3....0..0..3....3..4..1....3..4..1....1..3..3....2..3..3....3..2..2
..4..4..4....4..4..3....3..4..1....3..4..1....4..4..4....2..4..4....3..4..4
CROSSREFS
Sequence in context: A037617 A295603 A199144 * A332243 A081042 A329019
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 28 2011
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 27 21:44 EDT 2024. Contains 372020 sequences. (Running on oeis4.)