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A147226
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 11011-01110 pattern in any orientation.
0
1, 1, 1, 1, 1, 3, 10, 29, 94, 321, 1262, 7231, 51504, 415403, 3863371, 41121252, 505066528, 7638140887, 140942068334, 3073652987530, 79190388734899, 2405781069528047
OFFSET
1,6
EXAMPLE
Maximal 8 X 8 example
.0.1.1.0.1.1.0.0
.1.0.1.1.1.0.0.0
.1.1.0.0.0.0.0.1
.0.1.0.0.0.0.1.1
.1.1.0.0.0.0.1.0
.1.0.0.0.0.0.1.1
.0.0.0.1.1.1.0.1
.0.0.1.1.0.1.1.0
CROSSREFS
Sequence in context: A052976 A361365 A147363 * A301879 A147062 A293155
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved