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A147492
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 11101-10111 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 5, 13, 29, 115, 371, 1127, 6493, 42101, 265099, 2205911, 20203737, 188160663, 2232930361, 31949821401, 512095816829, 9852484817887, 220067190717237
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.1.1
.0.0.0.0.0.0.0.1
.0.0.0.0.0.0.1.1
.0.0.0.0.0.0.1.0
.0.0.0.0.0.0.1.1
.0.1.0.1.1.1.0.0
.0.1.1.1.0.1.0.0
CROSSREFS
Sequence in context: A147349 A147288 A146420 * A182069 A085555 A224888
KEYWORD
nonn
AUTHOR
STATUS
approved