A147482 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11011-01110-00100 pattern in any orientation.

1, 1, 1, 1, 7, 1, 32, 9, 247, 55, 7527, 1429, 368384, 45879, 31665405, 2855306, 5088454688, 352337351, 1569436037179, 84647830613, 948743940167332, 37496914297413, 1098189573005175931, 32036480319505329

Offset

1,5

Links

Table of n, a(n) for n=1..24.

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
.1.0.0.0.0.0.0.1
.1.1.0.0.0.0.1.1
.0.1.1.0.0.1.1.0
.1.1.0.0.0.0.1.1
.1.0.0.0.0.0.0.1

Crossrefs

Sequence in context: A228498 A084181 A002678 * A171770 A050402 A027643

Adjacent sequences: A147479 A147480 A147481 * A147483 A147484 A147485

Keyword

nonn

Author

R. H. Hardin

Status

approved