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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. 0
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 (list; graph; refs; listen; history; text; internal format)
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 A259531

Adjacent sequences:  A147367 A147368 A147369 * A147371 A147372 A147373

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified October 16 18:38 EDT 2019. Contains 328102 sequences. (Running on oeis4.)