A268778 Number of nX5 binary arrays with some element plus some horizontally, vertically, diagonally or antidiagonally adjacent neighbor totalling two no more than once.

23, 148, 1031, 6383, 38483, 224960, 1288693, 7271509, 40511381, 223527424, 1223021243, 6646278717, 35903716877, 192977652868, 1032630435883, 5504232072227, 29238119105311, 154834459041646, 817685821067843

Offset

1,1

Comments

Column 5 of A268781.

Links

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

Formula

Empirical: a(n) = 4*a(n-1) +28*a(n-2) -62*a(n-3) -314*a(n-4) +78*a(n-5) +867*a(n-6) +6*a(n-7) -859*a(n-8) +46*a(n-9) +215*a(n-10) -8*a(n-11) -16*a(n-12)

Example

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

Crossrefs

Cf. A268781.

Sequence in context: A139175 A055827 A255418 * A231207 A142902 A362315

Adjacent sequences: A268775 A268776 A268777 * A268779 A268780 A268781

Keyword

nonn

Author

R. H. Hardin, Feb 13 2016

Status

approved