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A147483 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11011-01110-00100 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 6, 1, 15, 1, 83, 13, 668, 49, 6957, 332, 94212, 3073, 1778981, 36531, 47461296, 597879, 1754228305, 14127501, 89063295956, 454449581 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

LINKS

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

EXAMPLE

Maximal 9 X 9 example

.0.0.1.1.0.1.1.0.0

.0.0.0.1.1.1.0.0.0

.1.0.0.0.1.0.0.0.1

.1.1.0.0.0.0.0.1.1

.0.1.1.0.0.0.1.1.0

.1.1.0.0.0.0.0.1.1

.1.0.0.0.1.0.0.0.1

.0.0.0.1.1.1.0.0.0

.0.0.1.1.0.1.1.0.0

CROSSREFS

Sequence in context: A062190 A080211 A146997 * A050309 A103217 A136273

Adjacent sequences:  A147480 A147481 A147482 * A147484 A147485 A147486

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified December 1 22:12 EST 2021. Contains 349435 sequences. (Running on oeis4.)