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A147058 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0100-1101-0111 pattern in any orientation. 0
1, 1, 1, 1, 1, 17, 47, 213, 1235, 4969, 37883, 407179, 4619435, 65431997, 1207923913, 24951197669, 667166329171 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

LINKS

Table of n, a(n) for n=1..17.

EXAMPLE

Maximal 8 X 8 example

.0.1.1.0.0.0.1.1

.0.1.0.0.0.0.0.1

.0.1.1.1.0.1.1.1

.0.0.1.0.0.0.1.0

.0.1.0.0.0.1.0.0

.1.1.1.0.1.1.1.0

.1.0.0.0.0.0.1.0

.1.1.0.0.0.1.1.0

CROSSREFS

Sequence in context: A220081 A229448 A155841 * A083296 A159850 A031122

Adjacent sequences:  A147055 A147056 A147057 * A147059 A147060 A147061

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified June 20 06:56 EDT 2021. Contains 345157 sequences. (Running on oeis4.)