A259634 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 or 00000001

18, 64, 581, 4146, 44500, 899557, 19848497, 593505391, 28804661988, 1803294030851, 150215435682396, 18581117366931470, 3161106877662837437, 725638805668965032687, 236686439674936087627391

Offset

1,1

Comments

Diagonal of A259642

Links

R. H. Hardin, Table of n, a(n) for n = 1..18

Example

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

Crossrefs

Cf. A259642

Sequence in context: A238240 A232385 A275155 * A327836 A165029 A264652

Adjacent sequences: A259631 A259632 A259633 * A259635 A259636 A259637

Keyword

nonn

Author

R. H. Hardin, Jul 02 2015

Status

approved