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URL: https://oeis.org/A383010

⇱ A383010 - OEIS


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A383010
a(n) = -Sum_{d|n} (-n)^d.
2
1, -2, 30, -268, 3130, -46470, 823550, -16781368, 387421227, -9999900090, 285311670622, -8916103453380, 302875106592266, -11112006720144694, 437893890381622140, -18446744078004584688, 827240261886336764194, -39346408075098212291754, 1978419655660313589123998
OFFSET
1,2
PROG
(PARI) a(n) = -sumdiv(n, d, (-n)^d);
CROSSREFS
Sequence in context: A215237 A379567 A189103 * A368498 A300423 A300685
KEYWORD
sign,easy
AUTHOR
Seiichi Manyama, Apr 12 2025
STATUS
approved