A269008 Number of n X 5 binary arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two exactly once.

10, 88, 1078, 10976, 109058, 1053432, 10002542, 93733440, 869397882, 7996744280, 73044076454, 663272676512, 5992284643698, 53897945082104, 482908211678430, 4311837258739840, 38381936117267690, 340717648957870424

Offset

1,1

Comments

Column 5 of A269011.

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
..1..0..0..0..0. .0..0..0..0..1. .1..0..0..0..1. .0..0..0..0..1
..1..0..0..1..0. .0..1..0..1..0. .1..0..0..0..1. .0..1..0..0..1
..0..0..1..0..0. .0..1..0..0..0. .0..1..0..0..0. .0..0..0..1..0
..1..0..1..0..1. .0..1..0..0..1. .0..0..0..0..0. .0..0..0..0..0

Crossrefs

Cf. A269011.

Sequence in context: A298134 A163030 A302149 * A000826 A282555 A120923

Adjacent sequences: A269005 A269006 A269007 * A269009 A269010 A269011

Keyword

nonn

Author

R. H. Hardin, Feb 17 2016

Status

approved