A053036 - cp's OEIS frontend

A053036 Number of values which are not powers of 2 in the trajectory when A051953 (cototient function) is repeatedly applied starting with n!.

n	a(n)
1	1
2	1
3	2
4	2
5	4
6	5
7	7
8	7
9	9
10	20
11	22
12	23
13	35
14	38
15	35
16	35
17	48
18	54
19	62
20	79
21	79
22	85
23	64
24	65
25	108
26	124
27	133
28	130
29	120
30	158
31	128
32	128
33	170
34	181
35	179
36	189
37	220
38	181
39	226
40	228
41	192
42	255
43	268
44	268
45	269
46	292
47	291
48	286
49	317
50	324
51	337
52	288
53	354
54	352
55	384
56	378
57	396
58	345
59	426
60	393

[1, 1, 2, 2, 4, 5, 7, 7, 9, 20, 22, 23, 35, 38, 35, 35, 48, 54, 62, 79, 79, 85, 64, 65, 108, 124, 133, 130, 120, 158, 128, 128, 170, 181, 179, 189, 220, 181, 226, 228, 192, 255, 268, 268, 269, 292, 291, 286, 317, 324, 337, 288, 354, 352, 384, 378, 396, 345, 426, 393]

cp's OEIS Frontend

A053036 Number of values which are not powers of 2 in the trajectory when A051953 (cototient function) is repeatedly applied starting with n!.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	2
5	4
6	5
7	7
8	7
9	9
10	20
11	22
12	23
13	35
14	38
15	35
16	35
17	48
18	54
19	62
20	79
21	79
22	85
23	64
24	65
25	108
26	124
27	133
28	130
29	120
30	158
31	128
32	128
33	170
34	181
35	179
36	189
37	220
38	181
39	226
40	228
41	192
42	255
43	268
44	268
45	269
46	292
47	291
48	286
49	317
50	324
51	337
52	288
53	354
54	352
55	384
56	378
57	396
58	345
59	426
60	393

n	a(n)
1	1
2	1
3	2
4	2
5	4
6	5
7	7
8	7
9	9
10	20
11	22
12	23
13	35
14	38
15	35
16	35
17	48
18	54
19	62
20	79
21	79
22	85
23	64
24	65
25	108
26	124
27	133
28	130
29	120
30	158
31	128
32	128
33	170
34	181
35	179
36	189
37	220
38	181
39	226
40	228
41	192
42	255
43	268
44	268
45	269
46	292
47	291
48	286
49	317
50	324
51	337
52	288
53	354
54	352
55	384
56	378
57	396
58	345
59	426
60	393

n	a(n)
1	1
2	1
3	2
4	2
5	4
6	5
7	7
8	7
9	9
10	20
11	22
12	23
13	35
14	38
15	35
16	35
17	48
18	54
19	62
20	79
21	79
22	85
23	64
24	65
25	108
26	124
27	133
28	130
29	120
30	158
31	128
32	128
33	170
34	181
35	179
36	189
37	220
38	181
39	226
40	228
41	192
42	255
43	268
44	268
45	269
46	292
47	291
48	286
49	317
50	324
51	337
52	288
53	354
54	352
55	384
56	378
57	396
58	345
59	426
60	393