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A147276
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1100-0111-0001 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 225, 445, 5061, 12325, 159173, 439491, 12030763, 38257835, 4443537629, 17894441301, 5108288425395, 26137633294785, 7314126561550685
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,9
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EXAMPLE
| Maximal 9 X 9 example
.0.0.0.1.0.1.0.0.0
.0.1.1.1.0.1.1.1.0
.1.1.0.0.0.0.0.1.1
.1.0.0.0.0.0.0.0.1
.0.0.0.0.0.0.0.0.0
.1.0.0.0.0.0.0.0.1
.1.1.1.0.0.0.1.1.1
.0.0.1.1.0.1.1.0.0
.0.0.0.1.0.1.0.0.0
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CROSSREFS
| Sequence in context: A202005 A077347 A069919 * A193003 A117246 A027470
Adjacent sequences: A147273 A147274 A147275 * A147277 A147278 A147279
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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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