A147386 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 10001-11111-00100 pattern in any orientation.

1, 1, 1, 1, 1, 1, 5, 1, 10, 1, 58, 13, 354, 57, 2083

Offset

1,7

Links

Table of n, a(n) for n=1..15.

Example

Maximal 9 X 9 example
.0.0.1.0.0.0.1.0.0
.0.0.1.1.1.1.1.0.0
.1.1.0.0.1.0.0.1.1
.0.1.0.0.0.0.0.1.0
.0.1.1.0.0.0.1.1.0
.0.1.0.0.0.0.0.1.0
.1.1.0.0.1.0.0.1.1
.0.0.1.1.1.1.1.0.0
.0.0.1.0.0.0.1.0.0

Crossrefs

Sequence in context: A147362 A147225 A147061 * A145759 A131414 A333448

Adjacent sequences: A147383 A147384 A147385 * A147387 A147388 A147389

Keyword

nonn

Author

R. H. Hardin

Status

approved