A053147 - cp's OEIS frontend

A053147 When cototient function (A051953) is iterated with initial value A002110(n), a(n) is the value of first (largest) power of 2 which appears in the iteration.

n	a(n)
1	2
2	4
3	8
4	32
5	32
6	256
7	32
8	512
9	256
10	65536
11	64
12	512
13	4096
14	256
15	512
16	128
17	16
18	2048
19	64
20	64
21	512
22	8192
23	256
24	8192
25	2048
26	131072
27	128
28	8192
29	1048576
30	16
31	2048
32	2048
33	32768
34	8192
35	512
36	524288
37	8192
38	64
39	16
40	8192
41	16
42	16
43	256
44	16

[2, 4, 8, 32, 32, 256, 32, 512, 256, 65536, 64, 512, 4096, 256, 512, 128, 16, 2048, 64, 64, 512, 8192, 256, 8192, 2048, 131072, 128, 8192, 1048576, 16, 2048, 2048, 32768, 8192, 512, 524288, 8192, 64, 16, 8192, 16, 16, 256, 16]

cp's OEIS Frontend

A053147 When cototient function (A051953) is iterated with initial value A002110(n), a(n) is the value of first (largest) power of 2 which appears in the iteration.

Table of values

List of values