A097003 - cp's OEIS frontend

A097003 Function A062402[x]=phi[sigma[x]] is iterated. a(n) is the number of distinct terms arising in the trajectory of 2^n; a(n)=t(n)+c(n)=t+c, where t is the number of transient terms, c is the number of recurrent terms [in the terminal cycle].

n	a(n)
0	1
1	1
2	2
3	1
4	3
5	4
6	4
7	1
8	3
9	4
10	10
11	3
12	3
13	11
14	16
15	1
16	7
17	10
18	13
19	25
20	10
21	5
22	79
23	58
24	99
25	100
26	94
27	92
28	59
29	37
30	54
31	1

[1, 1, 2, 1, 3, 4, 4, 1, 3, 4, 10, 3, 3, 11, 16, 1, 7, 10, 13, 25, 10, 5, 79, 58, 99, 100, 94, 92, 59, 37, 54, 1]