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A146902
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0010-1110-0111-0100 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 21, 33, 169, 271, 1427, 2719, 19923, 41145, 1164335, 2872687, 96665317, 273847235, 9740767609, 31500367345, 1586820300667, 5818312961823, 565090352547181, 2386581867483507, 366376672212858833, 1779376151775593621
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,9
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EXAMPLE
| Maximal 9 X 9 example
.0.1.0.0.0.0.0.1.0
.0.1.1.1.0.1.1.1.0
.1.1.1.0.0.0.1.1.1
.0.0.1.0.0.0.1.0.0
.0.0.0.0.0.0.0.0.0
.0.1.0.0.0.0.0.1.0
.0.1.1.1.0.1.1.1.0
.1.1.1.0.0.0.1.1.1
.0.0.1.0.0.0.1.0.0
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CROSSREFS
| Sequence in context: A033901 A033656 A032792 * A146910 A167397 A135595
Adjacent sequences: A146899 A146900 A146901 * A146903 A146904 A146905
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KEYWORD
| nonn
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net), Nov 04 2008
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