A261372 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00001011 00010101 or 01010101.

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

R. H. Hardin, Table of n, a(n) for n = 1..23

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 A162526 A078299

Adjacent sequences: A261369 A261370 A261371 * A261373 A261374 A261375

Keyword

nonn

Author

R. H. Hardin, Aug 17 2015

Status

approved