A097001 - cp's OEIS frontend

A097001 A062402(x)=sigma(phi[x]) function is iterated; initial value=2^n; a(n)=largest term of trajectory.

n	a(n)
1	2
2	4
3	12
4	16
5	72
6	252
7	312
8	256
9	1512
10	1860
11	12264
12	6552
13	26208
14	34200
15	93600
16	65536
17	833280
18	1116024
19	2239920
20	4464096
21	9865440
22	8124480
23	569540160
24	569540160
25	1100946774480
26	1100946774480
27	1100946774480
28	1100946774480
29	34696672920

[2, 4, 12, 16, 72, 252, 312, 256, 1512, 1860, 12264, 6552, 26208, 34200, 93600, 65536, 833280, 1116024, 2239920, 4464096, 9865440, 8124480, 569540160, 569540160, 1100946774480, 1100946774480, 1100946774480, 1100946774480, 34696672920]

cp's OEIS Frontend

A097001 A062402(x)=sigma(phi[x]) function is iterated; initial value=2^n; a(n)=largest term of trajectory.

Table of values

List of values