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A147184 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1111-0101 pattern in any orientation. 0
1, 1, 1, 1, 5, 25, 51, 201, 1169, 6421, 46097, 426039, 4475987, 69749651, 1072403047 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Maximal 8 X 8 example

.0.1.1.0.0.1.1.0

.0.0.1.0.0.0.1.1

.0.1.1.0.0.0.1.0

.0.0.1.1.0.0.1.1

.1.1.0.0.1.1.0.0

.0.1.0.0.0.1.1.0

.1.1.0.0.0.1.0.0

.0.1.1.0.0.1.1.0

CROSSREFS

Sequence in context: A136911 A101654 A043106 * A036133 A062671 A225494

Adjacent sequences:  A147181 A147182 A147183 * A147185 A147186 A147187

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified June 6 04:15 EDT 2020. Contains 334859 sequences. (Running on oeis4.)