A147361 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 01110-11111 pattern in any orientation.

1, 1, 1, 1, 15, 5, 62, 17, 510, 89, 27004, 5555, 1402086, 252517, 161324581, 16208566, 45647676851, 3528341313, 18214143607973, 1173259124198, 14342537261685270, 702406050500183

Offset

1,5

Links

Table of n, a(n) for n=1..22.

Example

Maximal 8 X 8 example
.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
.0.1.1.0.0.1.1.0
.0.1.1.0.0.1.1.0
.0.1.1.0.0.1.1.0
.0.0.1.0.0.1.0.0

Crossrefs

Sequence in context: A335879 A147422 A147084 * A147224 A147060 A110791

Adjacent sequences: A147358 A147359 A147360 * A147362 A147363 A147364

Keyword

nonn

Author

R. H. Hardin

Status

approved