A147495 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 11101-10111 pattern in any orientation.

1, 1, 1, 1, 1, 1, 1, 5, 15, 25, 49, 107, 263, 719, 2181

Offset

1,8

Links

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

Example

Maximal 8 X 8 example
.1.0.1.1.1.0.1.1
.1.1.1.0.1.0.1.0
.0.0.0.0.0.0.1.1
.1.1.0.0.0.0.0.1
.1.0.0.0.0.0.1.1
.1.1.0.0.0.0.0.0
.0.1.0.1.0.1.1.1
.1.1.0.1.1.1.0.1

Crossrefs

Sequence in context: A353613 A229312 A197072 * A147426 A100437 A339567

Adjacent sequences: A147492 A147493 A147494 * A147496 A147497 A147498

Keyword

nonn

Author

R. H. Hardin

Status

approved