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A146674
Number of n X n binary arrays with all ones connected only in a 1100-0111-1100 pattern in any orientation.
0
1, 1, 1, 9, 25, 93, 633, 8913, 136370, 2447483, 66801664, 2869431585, 170625522480, 13470400903777
OFFSET
1,4
EXAMPLE
Maximal 8 X 8 example
.1.1.0.0.0.1.0.1
.0.1.1.1.0.1.1.1
.1.1.0.0.0.0.1.0
.0.0.0.0.0.0.1.0
.0.0.0.0.0.0.0.0
.1.1.0.0.1.1.0.0
.0.1.1.1.0.1.1.1
.1.1.0.0.1.1.0.0
CROSSREFS
Sequence in context: A147332 A147460 A147475 * A083672 A193644 A083100
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved