A268763 Number of nX5 binary arrays with some element plus some horizontally, vertically, diagonally or antidiagonally adjacent neighbor totalling two exactly once.

10, 105, 762, 5170, 32056, 193573, 1129042, 6475898, 36505596, 203462597, 1122256900, 6140903312, 33367393732, 180252797855, 968778729426, 5183858768244, 27630592631158, 146768594783741, 777214421588348

Offset

1,1

Comments

Column 5 of A268766.

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

Crossrefs

Cf. A268766.

Sequence in context: A077671 A117833 A117832 * A300850 A360276 A210136

Adjacent sequences: A268760 A268761 A268762 * A268764 A268765 A268766

Keyword

nonn

Author

R. H. Hardin, Feb 13 2016

Status

approved