A259734 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 or 01010101

20, 36, 190, 868, 4904, 36522, 416107, 4569918, 77901650, 1497446190, 42287505995, 1268416344438, 58326869184327, 2894771753919566, 215057618091485008, 17236097050206624440, 2090654209136652647325, 272722696022344377007246

Offset

1,1

Comments

Diagonal of A259742

Links

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

Example

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

Crossrefs

Cf. A259742

Sequence in context: A316098 A308664 A184065 * A294736 A378158 A217427

Adjacent sequences: A259731 A259732 A259733 * A259735 A259736 A259737

Keyword

nonn

Author

R. H. Hardin, Jul 04 2015

Status

approved