The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A363897 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A363897

Expansion of Sum_{k>0} k * x^k / (1 - x^(5*k)).
(history; published version)

#18 by OEIS Server at Thu Jun 29 11:50:29 EDT 2023

LINKS

Seiichi Manyama, <a href="/A363897/b363897_1.txt">Table of n, a(n) for n = 1..10000</a>

#17 by Alois P. Heinz at Thu Jun 29 11:50:29 EDT 2023

STATUS

proposed

approved

Discussion

Thu Jun 29

11:50

OEIS Server: Installed first b-file as b363897.txt.

#16 by Seiichi Manyama at Thu Jun 29 11:22:28 EDT 2023

STATUS

editing

proposed

#15 by Seiichi Manyama at Thu Jun 29 11:07:48 EDT 2023

LINKS

Seiichi Manyama, <a href="/A363897/b363897_1.txt">Table of n, a(n) for n = 1..10000</a>

#14 by Seiichi Manyama at Thu Jun 29 10:57:30 EDT 2023

FORMULA

G.f.: Sum_{k>0} x^(5*k-4) / (1 - x^(5*k-4))^2.

STATUS

approved

editing

#13 by Michael De Vlieger at Tue Jun 27 10:27:48 EDT 2023

STATUS

reviewed

approved

#12 by Michel Marcus at Tue Jun 27 09:16:42 EDT 2023

STATUS

proposed

reviewed

#11 by Amiram Eldar at Tue Jun 27 07:34:06 EDT 2023

STATUS

editing

proposed

#10 by Amiram Eldar at Tue Jun 27 07:34:02 EDT 2023

MATHEMATICA

a[n_] := DivisorSum[n, # &, Mod[n/#, 5] == 1 &]; Array[a, 100] (* Amiram Eldar, Jun 27 2023 *)

STATUS

proposed

editing

#9 by Seiichi Manyama at Tue Jun 27 06:59:24 EDT 2023

STATUS

editing

proposed