A260536 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010001

40, 131, 774, 2775, 9184, 50674, 219852, 991164, 6265304, 31978322, 161993488, 1205560940, 7787001888, 46339128440, 362482299512, 2995644789618

Offset

1,1

Comments

Diagonal of A260544

Links

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

Example

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

Crossrefs

Cf. A260544

Sequence in context: A044672 A044969 A300536 * A251137 A251130 A231077

Adjacent sequences: A260533 A260534 A260535 * A260537 A260538 A260539

Keyword

nonn

Author

R. H. Hardin, Jul 28 2015

Status

approved