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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
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: A023653 A060182 A357945 * A189485 A226616 A226618
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified June 13 22:21 EDT 2024. Contains 373391 sequences. (Running on oeis4.)