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A146935
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1111-1111 pattern in any orientation.
0
1, 1, 1, 3, 1, 5, 1, 10, 7, 62, 25, 420, 89, 3595, 559, 35290, 4332, 459986, 47525, 9058999, 720844, 232457113, 13515353, 7854920994, 345530332, 353173272787, 11945906159, 21075055556569, 546900316419
OFFSET
1,4
EXAMPLE
Maximal 8 X 8 example
.0.0.1.1.1.1.0.0
.0.0.1.1.1.1.0.0
.1.1.0.0.0.0.1.1
.1.1.0.0.0.0.1.1
.1.1.0.0.0.0.1.1
.1.1.0.0.0.0.1.1
.0.0.1.1.1.1.0.0
.0.0.1.1.1.1.0.0
CROSSREFS
Sequence in context: A050354 A146434 A126213 * A360756 A133730 A330773
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved