A204736 Number of (n+1)X5 0..1 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero

63, 304, 1389, 6176, 26680, 113694, 476919, 1988919, 8234596, 34021482, 140153550, 577020406, 2373119682, 9758784830, 40115635266, 164904149636, 677790994154, 2785909304418, 11450373331929, 47062739127883, 193431925936638

Offset

1,1

Comments

Column 4 of A204740

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = a(n-1) +30*a(n-2) -14*a(n-3) -363*a(n-4) +75*a(n-5) +2444*a(n-6) -156*a(n-7) -10383*a(n-8) -177*a(n-9) +29550*a(n-10) +1794*a(n-11) -57869*a(n-12) -4627*a(n-13) +78312*a(n-14) +6440*a(n-15) -71976*a(n-16) -5208*a(n-17) +42880*a(n-18) +2304*a(n-19) -14928*a(n-20) -432*a(n-21) +2304*a(n-22)

Example

Some solutions for n=4
..1..1..0..1..1....0..1..0..1..1....0..1..1..0..1....0..1..0..1..1
..1..0..1..1..1....1..0..1..1..1....1..1..0..1..1....1..1..1..1..1
..1..1..0..1..1....1..1..0..1..1....0..1..1..0..1....0..1..0..1..1
..0..1..1..1..1....0..1..1..1..1....1..0..1..1..1....1..1..1..1..1
..1..1..0..1..1....1..0..1..1..1....1..1..0..1..1....0..1..0..1..1

Crossrefs

Sequence in context: A063398 A359564 A138833 * A160674 A034817 A160895

Adjacent sequences: A204733 A204734 A204735 * A204737 A204738 A204739

Keyword

nonn

Author

R. H. Hardin Jan 18 2012

Status

approved