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A147416 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1001-1111-0110 pattern in any orientation. 0
1, 1, 1, 1, 1, 3, 9, 20, 53, 192, 789, 4160, 25089, 166861, 1330315, 12854522 (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

.0.0.1.0.0.1.0.0

.0.0.1.1.1.1.0.0

.1.1.0.1.1.0.1.1

.0.1.1.0.0.1.1.0

.0.1.1.0.0.1.1.0

.1.1.0.1.1.0.1.1

.0.0.1.1.1.1.0.0

.0.0.1.0.0.1.0.0

CROSSREFS

Sequence in context: A226106 A026566 A147356 * A078841 A147387 A146267

Adjacent sequences:  A147413 A147414 A147415 * A147417 A147418 A147419

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified October 16 16:16 EDT 2019. Contains 328101 sequences. (Running on oeis4.)