A260286 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001001

48, 201, 1336, 5629, 10952, 72652, 385280, 1076482, 6847376, 52370322, 193796536, 1164631962, 12219797584, 66126528758, 352038007240, 4424875060216

Offset

1,1

Comments

Diagonal of A260294

Links

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

Example

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

Crossrefs

Cf. A260294

Sequence in context: A072254 A290350 A260098 * A183683 A260240 A260062

Adjacent sequences: A260283 A260284 A260285 * A260287 A260288 A260289

Keyword

nonn

Author

R. H. Hardin, Jul 22 2015

Status

approved