A147490 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11101-10111 pattern in any orientation.

1, 1, 1, 1, 3, 5, 13, 17, 35, 51, 1825, 3971, 48723, 116645, 1517741, 3942921, 214672131, 697172557, 31731412817, 118373336977, 6545880122717, 27404882486137, 4959503000804673, 24825440098741127

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
.0.1.1.0.0.1.1.0
.0.0.1.0.0.1.0.0
.0.1.1.0.0.1.1.0
.0.1.0.0.0.0.1.0
.0.1.1.0.0.1.1.0

Crossrefs

Sequence in context: A065311 A206549 A040158 * A266234 A180008 A089996

Adjacent sequences: A147487 A147488 A147489 * A147491 A147492 A147493

Keyword

nonn

Author

R. H. Hardin

Status

approved