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A146063
Number of n X n binary arrays with all ones connected only in a 5-point zee 1,1 2,1 2,2 2,3 3,3 in any orientation.
0
1, 1, 5, 17, 53, 497, 10289, 196357, 5677027, 310742317, 27512226687, 3369038880519, 646981592661815, 203366474520147193
OFFSET
1,3
EXAMPLE
Maximal 8 X 8 example
.0.0.1.0.0.0.1.0
.1.1.1.0.1.1.1.0
.1.0.0.0.1.0.0.1
.0.0.0.0.0.1.1.1
.0.1.1.0.0.1.0.0
.0.1.0.1.1.0.0.1
.1.1.0.1.0.1.1.1
.0.0.1.1.0.1.0.0
CROSSREFS
Sequence in context: A242429 A097160 A149656 * A146006 A161470 A295163
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 26 2008
STATUS
approved