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A261372
Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00001011 00010101 or 01010101.
1
36, 41, 202, 1040, 5633, 42302, 461576, 5441268, 87288274, 1757770516, 47269754142, 1497418790742, 65202132975489, 3410709440318090, 240487233522340499, 20318813275802198468, 2337266627779577763890
OFFSET
1,1
COMMENTS
Diagonal of A261380.
LINKS
EXAMPLE
Some solutions for n=4
..1..0..1..0..0..0....1..0..0..1..0..1....0..0..0..1..0..1....1..0..1..0..1..0
..0..1..0..1..0..1....1..0..0..0..1..0....1..0..1..0..1..0....0..1..0..1..0..0
..0..0..1..0..1..0....0..1..0..1..0..0....0..1..0..1..0..1....1..0..1..0..1..0
..0..1..0..1..0..1....1..0..1..0..1..0....1..0..1..0..1..0....0..0..0..1..0..1
..1..0..1..0..0..0....0..1..0..1..0..1....0..0..0..1..0..1....1..0..1..0..0..0
..0..0..0..1..0..0....0..0..1..0..1..0....0..0..1..0..0..0....0..1..0..1..0..0
CROSSREFS
Cf. A261380.
Sequence in context: A067372 A084147 A261258 * A044862 A376834 A162526
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 17 2015
STATUS
approved