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A146619
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1001-1111 pattern in any orientation.
0
1, 1, 1, 7, 5, 29, 17, 229, 435, 11673, 13907, 525361, 673479, 94102915, 98332589, 24274612029, 24632647889, 11463377696197, 15275499402585, 14840749743707725, 19628783151131753, 35553199302440544313, 48796642845817392973
OFFSET
1,4
EXAMPLE
Maximal 8 X 8 example
.0.0.1.0.0.1.0.0
.0.0.1.1.1.1.0.0
.1.1.0.0.0.0.1.1
.1.0.1.1.1.1.0.1
.1.0.1.0.0.1.0.1
.1.1.0.0.0.0.1.1
.0.0.1.0.0.1.0.0
.0.0.1.1.1.1.0.0
CROSSREFS
Sequence in context: A226661 A120404 A334784 * A059990 A213246 A213243
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved