A261105 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010001 00010101 or 01010101

28, 52, 278, 1498, 13040, 127038, 2037285, 35551388, 1021480084, 32245216400, 1673092329256, 95096605137684, 8890756299113053, 911310851213791400, 153607181860224749014, 28380233483547958852746, 8623267987086739769774234

Offset

1,1

Comments

Diagonal of A261113

Links

R. H. Hardin, Table of n, a(n) for n = 1..22

Example

Some solutions for n=4
..1..0..1..0..1..0....1..0..0..0..1..0....0..1..0..1..0..0....0..1..0..1..0..1
..0..1..0..1..0..0....0..1..0..1..0..1....1..0..0..0..1..0....1..0..1..0..1..0
..0..0..1..0..1..0....0..0..1..0..1..0....0..1..0..1..0..1....0..0..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..0..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..0....0..1..0..1..0..1....0..0..1..0..1..0....0..0..1..0..1..0

Crossrefs

Cf. A261113

Sequence in context: A181793 A224545 A216303 * A043134 A039311 A043914

Adjacent sequences: A261102 A261103 A261104 * A261106 A261107 A261108

Keyword

nonn

Author

R. H. Hardin, Aug 08 2015

Status

approved