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A146996
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 00100-00100-11111 pattern in any orientation.
0
1, 1, 1, 1, 7, 1, 28, 9, 229, 55, 5513, 1233, 246733, 35489, 18835539, 2205048, 2577591714, 236261747, 672360073942, 49798609885, 337403612881491, 18952604466995, 317710878094077132, 13788718527302227
OFFSET
1,5
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.1.0.0.1.0.0
.0.0.1.0.0.1.0.0
.1.1.1.0.0.1.1.1
.0.0.1.0.0.1.0.0
.0.0.1.0.0.1.0.0
CROSSREFS
Sequence in context: A053288 A282917 A050301 * A286895 A083994 A301731
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved