A070807 - cp's OEIS frontend

A070807 Composite numbers n such that Cototient(totient(n))=A070556(n) is power of 2.

n	a(n)
1	4
2	6
3	8
4	9
5	10
6	12
7	14
8	15
9	16
10	18
11	20
12	21
13	24
14	26
15	28
16	30
17	32
18	34
19	35
20	36
21	39
22	40
23	42
24	45
25	48
26	51
27	52
28	56
29	58
30	60
31	64
32	65
33	68
34	70
35	72
36	78
37	80
38	84
39	85
40	87
41	90
42	96
43	102
44	104
45	105
46	112
47	116
48	119
49	120
50	128
51	130
52	136
53	140
54	144
55	145
56	153
57	156
58	160
59	168
60	170
61	174
62	180
63	192

[4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 26, 28, 30, 32, 34, 35, 36, 39, 40, 42, 45, 48, 51, 52, 56, 58, 60, 64, 65, 68, 70, 72, 78, 80, 84, 85, 87, 90, 96, 102, 104, 105, 112, 116, 119, 120, 128, 130, 136, 140, 144, 145, 153, 156, 160, 168, 170, 174, 180, 192]

cp's OEIS Frontend

A070807 Composite numbers n such that Cototient(totient(n))=A070556(n) is power of 2.

Table of values

List of values

n	a(n)
1	4
2	6
3	8
4	9
5	10
6	12
7	14
8	15
9	16
10	18
11	20
12	21
13	24
14	26
15	28
16	30
17	32
18	34
19	35
20	36
21	39
22	40
23	42
24	45
25	48
26	51
27	52
28	56
29	58
30	60
31	64
32	65
33	68
34	70
35	72
36	78
37	80
38	84
39	85
40	87
41	90
42	96
43	102
44	104
45	105
46	112
47	116
48	119
49	120
50	128
51	130
52	136
53	140
54	144
55	145
56	153
57	156
58	160
59	168
60	170
61	174
62	180
63	192

n	a(n)
1	4
2	6
3	8
4	9
5	10
6	12
7	14
8	15
9	16
10	18
11	20
12	21
13	24
14	26
15	28
16	30
17	32
18	34
19	35
20	36
21	39
22	40
23	42
24	45
25	48
26	51
27	52
28	56
29	58
30	60
31	64
32	65
33	68
34	70
35	72
36	78
37	80
38	84
39	85
40	87
41	90
42	96
43	102
44	104
45	105
46	112
47	116
48	119
49	120
50	128
51	130
52	136
53	140
54	144
55	145
56	153
57	156
58	160
59	168
60	170
61	174
62	180
63	192

n	a(n)
1	4
2	6
3	8
4	9
5	10
6	12
7	14
8	15
9	16
10	18
11	20
12	21
13	24
14	26
15	28
16	30
17	32
18	34
19	35
20	36
21	39
22	40
23	42
24	45
25	48
26	51
27	52
28	56
29	58
30	60
31	64
32	65
33	68
34	70
35	72
36	78
37	80
38	84
39	85
40	87
41	90
42	96
43	102
44	104
45	105
46	112
47	116
48	119
49	120
50	128
51	130
52	136
53	140
54	144
55	145
56	153
57	156
58	160
59	168
60	170
61	174
62	180
63	192