A259993 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00000101

48, 269, 2532, 12620, 55276, 760397, 4405472, 16728076, 252106808, 2271107674, 11377346280, 109672934102, 1249209797976, 12832413750726, 113080397436236, 943724463804782

Offset

1,1

Comments

Diagonal of A260001

Links

Table of n, a(n) for n=1..16.

Example

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

Crossrefs

Cf. A260001

Sequence in context: A205469 A115056 A001337 * A205747 A173121 A281234

Adjacent sequences: A259990 A259991 A259992 * A259994 A259995 A259996

Keyword

nonn

Author

R. H. Hardin, Jul 12 2015

Status

approved