A260276 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00001011

34, 85, 747, 6044, 65907, 1271212, 28517537, 866931786, 41412466296, 2594607954501, 217632708449176, 26820265742576644, 4556787104721551797, 1048460617788126795330, 341811609666627431538479

Offset

1,1

Comments

Diagonal of A260284

Links

R. H. Hardin, Table of n, a(n) for n = 1..18

Example

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

Crossrefs

Cf. A260284

Sequence in context: A036199 A092223 A046764 * A278311 A213025 A365200

Adjacent sequences: A260273 A260274 A260275 * A260277 A260278 A260279

Keyword

nonn

Author

R. H. Hardin, Jul 22 2015

Status

approved