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A139673 Number of n X n symmetric binary matrices with all row sums 6. +0
1
1, 232, 66178, 24243520, 11234051976, 6549149852112, 4762109992158288 (list; graph; listen)
OFFSET

6,2
CROSSREFS

Sequence in context: A153466 A156391 A125850 this_sequence A151629 A132917 A139652

Adjacent sequences: A139670 A139671 A139672 this_sequence A139674 A139675 A139676

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net), Jun 12 2008

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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