A066971 - cp's OEIS frontend

A066971 a(n) = sigma(sigma(sigma(n))).

n	a(n)
1	1
2	7
3	8
4	15
5	28
6	56
7	24
8	60
9	24
10	56
11	56
12	120
13	60
14	168
15	168
16	63
17	56
18	120
19	96
20	252
21	104
22	112
23	168
24	480
25	63
26	252
27	234
28	360
29	195
30	336
31	104
32	210
33	224
34	360
35	224
36	248
37	168
38	480
39	360
40	546
41	252
42	728
43	224
44	504
45	480
46	336
47	224
48	504
49	186
50	255
51	336
52	260
53	360
54	1170
55	336
56	1170

[1, 7, 8, 15, 28, 56, 24, 60, 24, 56, 56, 120, 60, 168, 168, 63, 56, 120, 96, 252, 104, 112, 168, 480, 63, 252, 234, 360, 195, 336, 104, 210, 224, 360, 224, 248, 168, 480, 360, 546, 252, 728, 224, 504, 480, 336, 224, 504, 186, 255, 336, 260, 360, 1170, 336, 1170]

cp's OEIS Frontend

A066971 a(n) = sigma(sigma(sigma(n))).

Table of values

List of values