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

Author

R. H. Hardin, Feb 19 2016

Keywords

• nonn

Comments

Column 5 of A269075.

Examples

			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
		

Links

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

Crossrefs

Cf. A269075.

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)