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A261257
Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 00100101 or 01010101.
1
36, 52, 288, 1918, 11733, 85506, 1062118, 13599460, 242945986, 5120328922, 155899484972, 5208071829848, 253966207382266, 14042932506665452, 1114055271066551642, 99140006022295429922, 12815515680476819645301
OFFSET
1,1
COMMENTS
Diagonal of A261265.
LINKS
EXAMPLE
Some solutions for n=4
..0..1..0..1..0..0....0..1..0..0..0..1....0..0..0..1..0..1....1..0..1..0..0..0
..0..0..1..0..1..0....0..0..1..0..1..0....1..0..1..0..0..0....0..0..0..1..0..1
..0..1..0..1..0..1....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..1
..0..1..0..1..0..1....0..0..0..1..0..0....0..0..0..1..0..0....0..0..1..0..1..0
..1..0..1..0..0..0....0..0..1..0..1..0....1..0..1..0..0..1....1..0..0..1..0..1
CROSSREFS
Cf. A261265.
Sequence in context: A050691 A211720 A261285 * A188243 A335104 A242343
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 13 2015
STATUS
approved