A259715 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 or 00000011

32, 95, 568, 2059, 3120, 16294, 75200, 165976, 671824, 3555562, 11248808, 39460604, 210749488, 895687412, 3251082768, 16440249886, 84298558576

Offset

1,1

Comments

Diagonal of A259723

Links

Table of n, a(n) for n=1..17.

Example

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

Crossrefs

Cf. A259723

Sequence in context: A188184 A126386 A208635 * A195088 A050429 A362841

Adjacent sequences: A259712 A259713 A259714 * A259716 A259717 A259718

Keyword

nonn

Author

R. H. Hardin, Jul 03 2015

Status

approved