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A147418 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1001-1111-0110 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 2, 1, 4, 1, 6, 3, 13, 9, 46 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,8

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: A118275 A243824 A146938 * A146386 A305098 A128099

Adjacent sequences:  A147415 A147416 A147417 * A147419 A147420 A147421

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified August 22 20:37 EDT 2019. Contains 326186 sequences. (Running on oeis4.)