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A147207 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-0101-0111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 13, 37, 65, 115, 397, 1335, 4065, 16853, 83455, 458373, 2464107, 13365801, 84069939, 594053347 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,8

LINKS

Table of n, a(n) for n=1..21.

EXAMPLE

Maximal 8 X 8 example

.0.0.0.1.1.0.0.0

.0.1.0.1.0.1.1.0

.0.1.1.1.0.1.0.0

.1.0.0.0.0.1.1.1

.1.1.1.0.0.0.0.1

.0.0.1.0.1.1.1.0

.0.1.1.0.1.0.1.0

.0.0.0.1.1.0.0.0

CROSSREFS

Sequence in context: A138368 A118071 A307192 * A146877 A309720 A233435

Adjacent sequences:  A147204 A147205 A147206 * A147208 A147209 A147210

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified October 16 21:10 EDT 2019. Contains 328103 sequences. (Running on oeis4.)