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A147484
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 11011-01110-00100 pattern in any orientation.
0
1, 1, 1, 1, 1, 3, 8, 23, 63, 191, 685, 3493, 20460, 144341, 1163965, 10657560, 110643922, 1393408349, 20934516013, 373325933993, 7839237276478, 192639728351279, 5496880042565859
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
.1.1.0.1.0.0.0.1
.0.1.1.0.0.0.1.1
.1.1.0.0.0.1.1.0
.1.0.0.0.1.0.1.1
.0.0.0.1.1.1.0.1
.0.0.1.1.0.1.1.0
CROSSREFS
Sequence in context: A375468 A248870 A103819 * A316980 A331321 A017929
KEYWORD
nonn
AUTHOR
STATUS
approved