The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A352013 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A352013

a(n) = Sum_{d|n} (-1)^(n/d+1) * (n-1)!/(d-1)!.
(history; published version)

#21 by Joerg Arndt at Wed Aug 30 02:00:28 EDT 2023

STATUS

reviewed

approved

#20 by Michel Marcus at Wed Aug 30 01:55:36 EDT 2023

STATUS

proposed

reviewed

#19 by Amiram Eldar at Wed Aug 30 00:13:42 EDT 2023

STATUS

editing

proposed

#18 by Amiram Eldar at Wed Aug 30 00:11:25 EDT 2023

MATHEMATICA

a[n_] := DivisorSum[n, (-1)^(n/#+1) * (n-1)!/(#-1)! &]; Array[a, 22] (* Amiram Eldar, Aug 30 2023 *)

STATUS

approved

editing

#17 by Michael De Vlieger at Sun Jun 18 11:41:41 EDT 2023

STATUS

reviewed

approved

#16 by Joerg Arndt at Sun Jun 18 09:38:20 EDT 2023

STATUS

proposed

reviewed

#15 by Seiichi Manyama at Sun Jun 18 09:21:10 EDT 2023

STATUS

editing

proposed

#14 by Seiichi Manyama at Sun Jun 18 08:53:52 EDT 2023

FORMULA

E.g.f.: -Sum_{k>0} (-1)^k * (exp(x^k) - 1)/k). - Seiichi Manyama, Jun 18 2023

#13 by Seiichi Manyama at Sun Jun 18 07:05:30 EDT 2023

FORMULA

E.g.f.: -sum(Sum_{k=1, N, >0} (-1)^k * (exp(x^k) - 1 )/k))). - Seiichi Manyama, Jun 18 2023

#12 by Seiichi Manyama at Sun Jun 18 07:04:23 EDT 2023

FORMULA

E.g.f.: -sum(k=1, N, (-1)^k*(exp(x^k) - 1 )/k))). - Seiichi Manyama, Jun 18 2023

STATUS

approved

editing