A269079 Number of 5Xn binary arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.

32, 244, 2343, 20400, 165607, 1383105, 10778640, 86308622, 661641931, 5146079168, 39031235709, 297777942033, 2239241624640, 16861326990168, 125878250277823, 939067269600080, 6967653661432115, 51619835791134129, 381021973991495280

Offset: 1

Author

R. H. Hardin, Feb 19 2016

Keywords

• nonn

Comments

Row 5 of A269075.

Examples

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

Links

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

Crossrefs

Cf. A269075.

Formula

Empirical: a(n) = 8*a(n-1) +52*a(n-2) -424*a(n-3) -816*a(n-4) +6756*a(n-5) +1362*a(n-6) -38476*a(n-7) +19016*a(n-8) +82920*a(n-9) -70008*a(n-10) -50556*a(n-11) +50607*a(n-12) +9180*a(n-13) -10404*a(n-14)