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A147500 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1110-0110-0111 pattern in any orientation. 0
1, 1, 1, 1, 1, 3, 9, 19, 37, 159, 849, 4243, 19707, 136969, 1272775, 12839957 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

LINKS

Table of n, a(n) for n=1..16.

EXAMPLE

Maximal 8 X 8 example

.0.0.1.1.1.0.0.0

.0.0.0.1.1.0.0.0

.1.0.0.1.1.1.0.0

.1.1.1.0.0.0.0.0

.1.1.1.0.0.0.0.0

.0.0.1.0.0.0.0.0

.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0

CROSSREFS

Sequence in context: A294367 A146694 A146050 * A115238 A005994 A080010

Adjacent sequences:  A147497 A147498 A147499 * A147501 A147502 A147503

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified February 23 17:41 EST 2018. Contains 299584 sequences. (Running on oeis4.)