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Search: id:A139683
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A139683 Number of n X n symmetric binary matrices with no row sum greater than 7. +0
1
1, 2, 8, 64, 1024, 32768, 2097152, 268435456, 66628946641, 29707592691510, 21634670753754060, 23709506474859569328, 36821021837919664452090 (list; graph; listen)
OFFSET

0,2

CROSSREFS

Sequence in context: A084282 A139681 A139682 this_sequence A139684 A139685 A006125

Adjacent sequences: A139680 A139681 A139682 this_sequence A139684 A139685 A139686

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net), Jun 13 2008

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


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