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A146802
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0110-1100-0111 pattern in any orientation.
0
1, 1, 1, 1, 1, 7, 21, 47, 187, 1039, 7375, 57703, 534255, 6065861, 87670715, 1568278041, 34768369321, 953623406901, 31496022601955, 1268361436313019, 63421807483845045
OFFSET
1,6
EXAMPLE
Maximal 8 X 8 example
.0.0.0.1.1.1.0.0
.0.0.1.1.0.0.0.0
.0.1.0.1.1.0.0.1
.1.1.1.0.0.1.0.1
.1.0.1.0.0.1.1.1
.1.0.0.1.1.0.1.0
.0.0.0.0.1.1.0.0
.0.0.1.1.1.0.0.0
CROSSREFS
Sequence in context: A287431 A127736 A212677 * A147054 A146629 A195965
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved