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A147218
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-0111-0101 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 17, 27, 575, 1091, 10073, 26275, 436817, 1241759, 99221321, 359430255, 57329770665, 261948614931, 43007975306403, 238557155162155, 61726897724737383
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.1.1.0.0.0.0.1.1
.0.1.0.0.0.0.1.0
.1.1.1.0.0.1.1.1
.0.0.1.0.0.1.0.0
.1.0.0.0.0.0.0.1
.1.1.1.0.0.1.1.1
.0.1.0.0.0.0.1.0
.0.1.1.0.0.1.1.0
CROSSREFS
Sequence in context: A171168 A147202 A146776 * A146856 A217409 A256361
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved