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A062740 Number of connected labeled graphs with loops. 0
1, 2, 4, 32, 608, 23296, 1709056, 238880768, 64396439552, 33943701028864, 35324404321091584, 72994114660256448512, 300460426062916084563968, 2468021884106048216693211136, 40495494119922790159005962469376 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

FORMULA

E.g.f.: 1+log( Sum_{n >= 0} 2^binomial(n+1, 2)*x^n/n! ).

CROSSREFS

Sequence in context: A101460 A118992 A012509 * A122214 A122216 A100117

Adjacent sequences:  A062737 A062738 A062739 * A062741 A062742 A062743

KEYWORD

easy,nonn

AUTHOR

Vladeta Jovovic (vladeta(AT)eunet.rs), Jul 12 2001

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Last modified February 13 14:55 EST 2012. Contains 205519 sequences.