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A147066 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 01010-11111 pattern in any orientation. 0
1, 1, 1, 1, 5, 13, 28, 77, 344, 1851, 11392, 75139, 594346, 5700553, 66311093, 914949886 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..16.

EXAMPLE

Maximal 8 X 8 example

.1.1.1.1.1.0.0.0

.0.1.0.1.0.0.0.1

.1.0.0.0.0.0.1.1

.1.1.0.0.0.0.0.1

.1.0.0.0.0.0.1.1

.1.1.0.0.0.0.0.1

.1.0.0.0.1.0.1.0

.0.0.0.1.1.1.1.1

CROSSREFS

Sequence in context: A023537 A023653 A060182 * A189485 A226616 A226618

Adjacent sequences:  A147063 A147064 A147065 * A147067 A147068 A147069

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified May 24 05:51 EDT 2022. Contains 354005 sequences. (Running on oeis4.)