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A086314 Total number of edges in the distinct simple graphs on n nodes. 2
0, 1, 6, 33, 170, 1170, 10962, 172844, 4944024, 270116280, 28022441260, 5448008695536, 1969579223350128, 1321964082404214704, 1649890513414726210320, 3840060942271653473695680 (list; graph; refs; listen; history; internal format)
OFFSET

1,3

COMMENTS

a(n)=A000088(n)*n(n-1)/4

a(n)=A000088(n)*A064038(n)/A014695(n)

LINKS

Eric Weisstein's World of Mathematics, Simple Graph

Eric Weisstein's World of Mathematics, Graph Edge

CROSSREFS

Cf. A000088, A014695, A064038.

Sequence in context: A072260 A203155 A084153 * A086091 A081893 A106850

Adjacent sequences:  A086311 A086312 A086313 * A086315 A086316 A086317

KEYWORD

nonn

AUTHOR

Eric Weisstein (eric(AT)weisstein.com), Jul 15, 2003

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Last modified February 17 10:05 EST 2012. Contains 206009 sequences.