A096998 - cp's OEIS frontend

A096998 Consider iteration of the function f(x) = sigma(phi(x)) = A062402(x). Sequence lists the numbers k such that the trajectory of k returns to k.

n	a(n)
1	1
2	3
3	7
4	12
5	15
6	28
7	31
8	60
9	72
10	124
11	168
12	195
13	252
14	255
15	744
16	1240
17	1512
18	1651
19	2418
20	2520
21	3066
22	3844
23	4092
24	4800
25	5080
26	5376
27	6045
28	6138
29	6552
30	9906
31	9920
32	10200
33	12264
34	20440
35	30855
36	36792
37	46228
38	58968
39	60984
40	65535
41	67963
42	81880
43	122640

[1, 3, 7, 12, 15, 28, 31, 60, 72, 124, 168, 195, 252, 255, 744, 1240, 1512, 1651, 2418, 2520, 3066, 3844, 4092, 4800, 5080, 5376, 6045, 6138, 6552, 9906, 9920, 10200, 12264, 20440, 30855, 36792, 46228, 58968, 60984, 65535, 67963, 81880, 122640]

cp's OEIS Frontend

A096998 Consider iteration of the function f(x) = sigma(phi(x)) = A062402(x). Sequence lists the numbers k such that the trajectory of k returns to k.

Table of values

List of values