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A076723 Sum_{d divides n} (-d)^d. 0
-1, 3, -28, 259, -3126, 46632, -823544, 16777475, -387420517, 9999996878, -285311670612, 8916100495144, -302875106592254, 11112006824734476, -437893890380862528, 18446744073726329091, -827240261886336764178, 39346408075296150201567 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..18.

FORMULA

G.f.: Sum_{n>0} (-n*x)^n/(1-x^n).

CROSSREFS

Cf. A062796.

Sequence in context: A037665 A037784 A037588 * A198887 A026114 A181069

Adjacent sequences:  A076720 A076721 A076722 * A076724 A076725 A076726

KEYWORD

sign

AUTHOR

Vladeta Jovovic, Oct 27 2002

STATUS

approved

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Last modified March 28 22:27 EDT 2017. Contains 284249 sequences.