A070811 - cp's OEIS frontend

A070811 Nonprime numbers k such that phi(k-phi(k)) = A054571(k) is not a power of 2.

n	a(n)
1	1
2	15
3	21
4	26
5	27
6	30
7	33
8	34
9	35
10	45
11	49
12	51
13	52
14	54
15	57
16	60
17	63
18	66
19	68
20	69
21	70
22	74
23	75
24	78
25	81
26	82
27	85
28	86
29	87
30	90
31	91
32	93
33	95
34	98
35	99
36	102
37	104
38	105
39	106
40	108
41	110
42	111
43	114
44	115
45	117
46	119
47	120
48	121
49	122
50	123
51	125
52	126
53	129
54	130
55	132
56	133
57	135
58	136
59	138
60	140

[1, 15, 21, 26, 27, 30, 33, 34, 35, 45, 49, 51, 52, 54, 57, 60, 63, 66, 68, 69, 70, 74, 75, 78, 81, 82, 85, 86, 87, 90, 91, 93, 95, 98, 99, 102, 104, 105, 106, 108, 110, 111, 114, 115, 117, 119, 120, 121, 122, 123, 125, 126, 129, 130, 132, 133, 135, 136, 138, 140]

cp's OEIS Frontend

A070811 Nonprime numbers k such that phi(k-phi(k)) = A054571(k) is not a power of 2.

Table of values

List of values

n	a(n)
1	1
2	15
3	21
4	26
5	27
6	30
7	33
8	34
9	35
10	45
11	49
12	51
13	52
14	54
15	57
16	60
17	63
18	66
19	68
20	69
21	70
22	74
23	75
24	78
25	81
26	82
27	85
28	86
29	87
30	90
31	91
32	93
33	95
34	98
35	99
36	102
37	104
38	105
39	106
40	108
41	110
42	111
43	114
44	115
45	117
46	119
47	120
48	121
49	122
50	123
51	125
52	126
53	129
54	130
55	132
56	133
57	135
58	136
59	138
60	140

n	a(n)
1	1
2	15
3	21
4	26
5	27
6	30
7	33
8	34
9	35
10	45
11	49
12	51
13	52
14	54
15	57
16	60
17	63
18	66
19	68
20	69
21	70
22	74
23	75
24	78
25	81
26	82
27	85
28	86
29	87
30	90
31	91
32	93
33	95
34	98
35	99
36	102
37	104
38	105
39	106
40	108
41	110
42	111
43	114
44	115
45	117
46	119
47	120
48	121
49	122
50	123
51	125
52	126
53	129
54	130
55	132
56	133
57	135
58	136
59	138
60	140

n	a(n)
1	1
2	15
3	21
4	26
5	27
6	30
7	33
8	34
9	35
10	45
11	49
12	51
13	52
14	54
15	57
16	60
17	63
18	66
19	68
20	69
21	70
22	74
23	75
24	78
25	81
26	82
27	85
28	86
29	87
30	90
31	91
32	93
33	95
34	98
35	99
36	102
37	104
38	105
39	106
40	108
41	110
42	111
43	114
44	115
45	117
46	119
47	120
48	121
49	122
50	123
51	125
52	126
53	129
54	130
55	132
56	133
57	135
58	136
59	138
60	140