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A147050 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0100-1100-0111-0010 pattern in any orientation. 0
1, 1, 1, 1, 1, 5, 17, 45, 201, 861, 4033, 28285, 222873, 2292605, 26123281, 391420701, 6423928729 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,6
LINKS
EXAMPLE
Maximal 8 X 8 example
.0.0.1.0.0.0.1.0
.0.0.1.1.0.0.1.1
.1.1.1.0.1.1.1.0
.0.1.0.0.0.1.0.0
.0.0.1.0.0.0.1.0
.0.1.1.1.0.1.1.1
.1.1.0.0.1.1.0.0
.0.1.0.0.0.1.0.0
CROSSREFS
Sequence in context: A320554 A218135 A271122 * A147397 A147193 A271302
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified July 20 20:50 EDT 2024. Contains 374459 sequences. (Running on oeis4.)