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A259634
Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 or 00000001
1
18, 64, 581, 4146, 44500, 899557, 19848497, 593505391, 28804661988, 1803294030851, 150215435682396, 18581117366931470, 3161106877662837437, 725638805668965032687, 236686439674936087627391
OFFSET
1,1
COMMENTS
Diagonal of A259642
LINKS
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
Sequence in context: A016728 A232385 A275155 * A327836 A165029 A264652
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 02 2015
STATUS
approved