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A147283
Number of n X n binary arrays with all ones connected only in a 1100-0111-0001-0001 pattern in any orientation.
0
1, 1, 1, 9, 41, 209, 1201, 15001, 432817, 13376085, 514375741, 28401013633
OFFSET
1,4
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.1.1.1.0
.0.1.1.1.0.0.1.0
.0.1.0.0.0.0.1.1
.1.1.0.0.0.0.0.1
.1.0.1.0.1.1.0.0
.0.0.1.0.0.1.1.1
.0.0.1.1.1.0.0.1
.0.0.0.0.1.1.0.1
CROSSREFS
Sequence in context: A199311 A146239 A083085 * A171422 A129793 A304361
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved