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A147076
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 10000-11111-10000 pattern in any orientation.
0
1, 1, 1, 1, 3, 1, 19, 9, 139, 27, 2920, 1117, 150482, 41401, 10982835, 1602485, 1208797417, 157953713, 292923653699, 29971826239, 128550895495446, 9240996121217
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
.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.0
.1.1.1.0.0.1.1.1
CROSSREFS
Sequence in context: A227888 A188109 A247232 * A372175 A027537 A192721
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved