A019295 - cp's OEIS frontend

A019295 a(n) = sigma(sigma(...(sigma(n))...)) / n, where sigma (A000203) is iterated until a multiple of n is reached.

n	a(n)
1	1
2	2
3	5
4	2
5	24
6	2
7	24
8	3
9	168
10	12
11	1834560
12	10
13	84480
14	12
15	4
16	2
17	92520
18	20
19	62720
20	84
21	3
22	49920
23	6516224
24	7
25	881280
26	28
27	3360
28	2
29	517517500266693633076805172570524811961093324800
30	728
31	912
32	18
33	19767296
34	46260
35	144
36	42
37	30349648609280
38	38644089120
39	30
40	663
41	34042889727216750428160

[1, 2, 5, 2, 24, 2, 24, 3, 168, 12, 1834560, 10, 84480, 12, 4, 2, 92520, 20, 62720, 84, 3, 49920, 6516224, 7, 881280, 28, 3360, 2, 517517500266693633076805172570524811961093324800, 728, 912, 18, 19767296, 46260, 144, 42, 30349648609280, 38644089120, 30, 663, 34042889727216750428160]

cp's OEIS Frontend

A019295 a(n) = sigma(sigma(...(sigma(n))...)) / n, where sigma (A000203) is iterated until a multiple of n is reached.

Table of values

List of values