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Search: id:A147276
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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
1
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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; listen)
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OFFSET
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1,9
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EXAMPLE
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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
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Sequence in context: A044871 A077347 A069919 this_sequence A117246 A027470 A134934
Adjacent sequences: A147273 A147274 A147275 this_sequence A147277 A147278 A147279
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KEYWORD
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nonn
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AUTHOR
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Ron Hardin (rhhardin(AT)att.net), Nov 04 2008
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