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A147035
Number of n X n binary arrays with all ones connected only in a 0100-0100-1111-0100 pattern in any orientation.
0
1, 1, 1, 5, 17, 39, 181, 1975, 28231, 443863, 9105701, 306959063, 15386456557, 1024328375043, 94252026378527
OFFSET
1,4
EXAMPLE
Maximal 8 X 8 example
.0.0.1.0.0.0.1.0
.1.1.1.1.0.0.1.0
.0.0.1.0.1.1.1.1
.0.0.1.0.0.0.1.0
.0.1.0.0.0.1.0.0
.0.1.0.0.1.1.1.1
.1.1.1.1.0.1.0.0
.0.1.0.0.0.1.0.0
CROSSREFS
Sequence in context: A146717 A147467 A146272 * A146134 A011931 A260981
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved