A147370 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0111-1100-0111 pattern in any orientation.

1, 1, 1, 1, 1, 1, 1, 1, 14, 9, 82, 25, 666, 57, 4092, 377, 52105, 5329, 1098160, 73458, 31100564, 886631, 940187683, 17314150, 39465005389, 625360491

Offset

1,9

Links

Table of n, a(n) for n=1..26.

Example

Maximal 9 X 9 example
.0.0.0.1.0.1.0.0.0
.0.0.0.1.0.1.0.0.0
.0.0.0.1.1.1.0.0.0
.1.1.1.0.1.0.1.1.1
.0.0.1.1.0.1.1.0.0
.1.1.1.0.1.0.1.1.1
.0.0.0.1.1.1.0.0.0
.0.0.0.1.0.1.0.0.0
.0.0.0.1.0.1.0.0.0

Crossrefs

Sequence in context: A266014 A086050 A128486 * A140739 A305946 A349806

Adjacent sequences: A147367 A147368 A147369 * A147371 A147372 A147373

Keyword

nonn

Author

R. H. Hardin

Status

approved