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Search: id:A139679
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A139679 Number of n X n symmetric binary matrices with no row sum greater than 3. +0
1
1, 2, 8, 64, 809, 13846, 301262, 8035168, 255780779, 9519891214, 407613033836, 19816627136912, 1082142442901863 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Adjacent sequences: A139676 A139677 A139678 this_sequence A139680 A139681 A139682

Sequence in context: A005612 A136282 A092934 this_sequence A005640 A134956 A011803

KEYWORD

nonn

AUTHOR

Ron Hardin (rhh(AT)cadence.com), Jun 13 2008

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Last modified October 6 16:13 EDT 2008. Contains 144667 sequences.

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