A269072 Number of nX5 binary arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.

23, 185, 1887, 17713, 165607, 1529241, 14011359, 127528641, 1154377943, 10400164377, 93314875007, 834244316721, 7434343205095, 66061046189497, 585498663953471, 5177144091416833, 45680435610848791, 402277442193052665

Offset

1,1

Comments

Column 5 of A269075.

Links

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

Formula

Empirical: a(n) = 24*a(n-1) -198*a(n-2) +584*a(n-3) +137*a(n-4) -2864*a(n-5) +1132*a(n-6) +4336*a(n-7) -1391*a(n-8) -2280*a(n-9) +90*a(n-10) +200*a(n-11) -25*a(n-12)

Example

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

Crossrefs

Cf. A269075.

Sequence in context: A229426 A274587 A302200 * A125360 A126518 A167467

Adjacent sequences: A269069 A269070 A269071 * A269073 A269074 A269075

Keyword

nonn

Author

R. H. Hardin, Feb 19 2016

Status

approved