A332617 - cp's OEIS frontend

A332617 a(n) = Sum_{k=1..n} J_n(k), where J is the Jordan function, J_n(k) = k^n * Product_{p|k, p prime} (1 - 1/p^n).

n	a(n)
1	1
2	4
3	34
4	336
5	4390
6	66312
7	1197858
8	24612000
9	574002448
10	14903406552
11	427622607366
12	13419501812640
13	457579466056498
14	16840326075104280
15	665473192580864556
16	28101209228393371200
17	1262896789586657015796
18	60182268296582518426368
19	3031282541337682050032664

[1, 4, 34, 336, 4390, 66312, 1197858, 24612000, 574002448, 14903406552, 427622607366, 13419501812640, 457579466056498, 16840326075104280, 665473192580864556, 28101209228393371200, 1262896789586657015796, 60182268296582518426368, 3031282541337682050032664]

cp's OEIS Frontend

A332617 a(n) = Sum_{k=1..n} J_n(k), where J is the Jordan function, J_n(k) = k^n * Product_{p|k, p prime} (1 - 1/p^n).

Table of values

List of values