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A260919
Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 00101011 or 01010101
1
36, 68, 401, 2208, 11608, 81848, 971381, 10662976, 181422568, 3460352248, 98952552192, 2935432680396, 136085020244379, 6702623882827610, 502445435345158337, 39885899773762437744, 4881874517425716225227
OFFSET
1,1
COMMENTS
Diagonal of A260927
LINKS
EXAMPLE
Some solutions for n=4
..0..1..0..1..0..0....0..1..0..1..0..1....0..1..0..1..0..0....0..1..0..1..0..1
..0..0..1..0..0..0....0..0..1..0..1..1....0..0..1..0..0..0....1..0..1..0..1..0
..0..1..0..1..0..1....0..1..0..1..0..0....0..1..0..1..0..1....0..1..0..1..0..1
..1..0..1..0..1..0....1..0..1..0..1..0....1..0..1..0..1..0....1..0..1..0..1..0
..0..1..0..1..0..0....0..1..0..1..0..1....0..0..0..1..0..1....0..0..0..1..0..1
..0..0..1..0..1..0....0..0..1..0..0..1....0..1..1..0..0..1....0..0..1..0..1..0
CROSSREFS
Sequence in context: A068144 A182428 A208128 * A247381 A249726 A335463
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 04 2015
STATUS
approved