A268883 Number of nX5 binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once.

10, 158, 2190, 27130, 317966, 3596174, 39670270, 429588382, 4585939726, 48401059362, 506108414670, 5251396681678, 54134020936742, 554930619106590, 5661171443312270, 57509255942550986, 582036972222995470

Offset

1,1

Comments

Column 5 of A268886.

Links

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

Formula

Empirical: a(n) = 26*a(n-1) -241*a(n-2) +994*a(n-3) -2060*a(n-4) +2218*a(n-5) -1201*a(n-6) +290*a(n-7) -25*a(n-8) for n>9

Example

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

Crossrefs

Cf. A268886.

Sequence in context: A129460 A379858 A200989 * A283721 A239761 A245916

Adjacent sequences: A268880 A268881 A268882 * A268884 A268885 A268886

Keyword

nonn

Author

R. H. Hardin, Feb 15 2016

Status

approved