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A147397
Number of n X n binary arrays with all ones connected only in a 1000-1110-0111-0001 pattern in any orientation.
0
1, 1, 1, 5, 17, 45, 217, 1729, 28581, 422837, 7769557, 212491441, 9353130173, 579241228119
OFFSET
1,4
EXAMPLE
Maximal 8 X 8 example
.1.1.0.0.1.1.0.0
.0.1.1.0.0.1.1.0
.0.1.1.0.0.1.1.0
.0.0.1.1.0.0.1.1
.1.0.0.0.1.0.0.0
.1.1.1.0.1.1.1.0
.0.1.1.1.0.1.1.1
.0.0.0.1.0.0.0.1
CROSSREFS
Sequence in context: A218135 A271122 A147050 * A147193 A271302 A147043
KEYWORD
nonn
AUTHOR
STATUS
approved