A260759 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010011

48, 115, 652, 2449, 5256, 24103, 104308, 305402, 1256376, 5925416, 21507088, 91126064, 441481332, 1976848566, 8589712868, 45244127036, 228262628800

Offset

1,1

Comments

Diagonal of A260767

Links

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

Example

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

Crossrefs

Cf. A260767

Sequence in context: A044235 A044616 A182679 * A211726 A232938 A362045

Adjacent sequences: A260756 A260757 A260758 * A260760 A260761 A260762

Keyword

nonn

Author

R. H. Hardin, Jul 30 2015

Status

approved