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

Author

R. H. Hardin, Aug 17 2015

Keywords

• nonn

Comments

Diagonal of A261380.

Examples

			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
		

Links

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

Crossrefs

Cf. A261380.