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A147077 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 10000-11111-10000 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 30, 13, 346, 65, 3487, 313, 36391, 2325, 506879, 24995, 9068596, 319309, 281171492, 7251986 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,11
LINKS
EXAMPLE
Maximal 11 X 11 example
.0.1.0.0.0.1.0.0.0.1.0
.0.1.0.0.0.1.0.0.0.1.0
.0.1.0.0.0.1.0.0.0.1.0
.0.1.0.0.0.1.0.0.0.1.0
.1.1.1.0.1.1.1.0.1.1.1
.0.0.0.0.0.0.0.0.0.0.0
.1.1.1.0.1.1.1.0.1.1.1
.0.1.0.0.0.1.0.0.0.1.0
.0.1.0.0.0.1.0.0.0.1.0
.0.1.0.0.0.1.0.0.0.1.0
.0.1.0.0.0.1.0.0.0.1.0
CROSSREFS
Sequence in context: A091746 A040874 A147454 * A263927 A033350 A070293
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified March 28 08:02 EDT 2024. Contains 371236 sequences. (Running on oeis4.)