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A146384
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0110-1111 pattern in any orientation.
0
1, 1, 1, 1, 3, 10, 29, 100, 387, 2276, 17581, 155034, 1632582, 20304423, 321404215, 6545616593, 163131399978, 4942168957230, 181963337378973, 8263219425456168, 468671383459094714, 32913148405732346545
OFFSET
1,5
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.1.0.0.0
.0.0.0.1.1.0.0.0
.0.0.0.1.1.0.0.0
.0.1.1.0.1.0.0.1
.1.1.1.1.0.0.1.1
.0.0.0.0.0.0.1.1
.0.0.0.0.1.1.0.1
.0.0.0.1.1.1.1.0
CROSSREFS
Sequence in context: A301879 A147062 A293155 * A166174 A376089 A365224
KEYWORD
nonn
AUTHOR
STATUS
approved