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Search: id:A140176
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A140176 Half the number of n X n symmetric binary matrices with adjacent rows differing in at most one position. +0
1
1, 3, 8, 17, 36, 71, 144, 289, 594, 1231, 2602, 5573, 12128, 26727, 59668, 134729, 307618, 709503, 1652402, 3883445, 9206712 (list; graph; listen)
OFFSET

1,2
CROSSREFS

Sequence in context: A112523 A147419 A106691 this_sequence A097391 A034481 A046994

Adjacent sequences: A140173 A140174 A140175 this_sequence A140177 A140178 A140179

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net), Jun 15 2008

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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