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A147475
Number of n X n binary arrays with all ones connected only in a 1100-1111-1100 pattern in any orientation.
0
1, 1, 1, 9, 25, 93, 633, 7225, 110262, 1975143, 50880872, 1933660635, 104069532412, 7622213781825
OFFSET
1,4
EXAMPLE
Maximal 8 X 8 example
.1.1.0.0.0.1.1.1
.1.1.1.1.0.1.1.1
.1.1.0.0.0.0.1.0
.0.0.0.0.0.0.1.0
.0.1.0.0.0.0.0.0
.0.1.0.0.0.0.1.1
.1.1.1.0.1.1.1.1
.1.1.1.0.0.0.1.1
CROSSREFS
Sequence in context: A075064 A147332 A147460 * A146674 A083672 A193644
KEYWORD
nonn
AUTHOR
STATUS
approved