A096989 - cp's OEIS frontend

A096989 Initial values for f(x)=sigma(phi[x])=A062402[x] such that iteration of f ends in cycle of length=2.

n	a(n)
1	5
2	7
3	8
4	9
5	10
6	11
7	12
8	14
9	18
10	22
11	37
12	43
13	49
14	51
15	53
16	57
17	61
18	63
19	64
20	65
21	67
22	68
23	71
24	73
25	74
26	76
27	77
28	79
29	80
30	81
31	83
32	85
33	86
34	87
35	89
36	91
37	93
38	95
39	96
40	97
41	98
42	99
43	101
44	102
45	103
46	104
47	105
48	106
49	107
50	108
51	109
52	111
53	112
54	113
55	114
56	115
57	116
58	117
59	119
60	120
61	121
62	122
63	123
64	124

[5, 7, 8, 9, 10, 11, 12, 14, 18, 22, 37, 43, 49, 51, 53, 57, 61, 63, 64, 65, 67, 68, 71, 73, 74, 76, 77, 79, 80, 81, 83, 85, 86, 87, 89, 91, 93, 95, 96, 97, 98, 99, 101, 102, 103, 104, 105, 106, 107, 108, 109, 111, 112, 113, 114, 115, 116, 117, 119, 120, 121, 122, 123, 124]

cp's OEIS Frontend

A096989 Initial values for f(x)=sigma(phi[x])=A062402[x] such that iteration of f ends in cycle of length=2.

Table of values

List of values

n	a(n)
1	5
2	7
3	8
4	9
5	10
6	11
7	12
8	14
9	18
10	22
11	37
12	43
13	49
14	51
15	53
16	57
17	61
18	63
19	64
20	65
21	67
22	68
23	71
24	73
25	74
26	76
27	77
28	79
29	80
30	81
31	83
32	85
33	86
34	87
35	89
36	91
37	93
38	95
39	96
40	97
41	98
42	99
43	101
44	102
45	103
46	104
47	105
48	106
49	107
50	108
51	109
52	111
53	112
54	113
55	114
56	115
57	116
58	117
59	119
60	120
61	121
62	122
63	123
64	124

n	a(n)
1	5
2	7
3	8
4	9
5	10
6	11
7	12
8	14
9	18
10	22
11	37
12	43
13	49
14	51
15	53
16	57
17	61
18	63
19	64
20	65
21	67
22	68
23	71
24	73
25	74
26	76
27	77
28	79
29	80
30	81
31	83
32	85
33	86
34	87
35	89
36	91
37	93
38	95
39	96
40	97
41	98
42	99
43	101
44	102
45	103
46	104
47	105
48	106
49	107
50	108
51	109
52	111
53	112
54	113
55	114
56	115
57	116
58	117
59	119
60	120
61	121
62	122
63	123
64	124

n	a(n)
1	5
2	7
3	8
4	9
5	10
6	11
7	12
8	14
9	18
10	22
11	37
12	43
13	49
14	51
15	53
16	57
17	61
18	63
19	64
20	65
21	67
22	68
23	71
24	73
25	74
26	76
27	77
28	79
29	80
30	81
31	83
32	85
33	86
34	87
35	89
36	91
37	93
38	95
39	96
40	97
41	98
42	99
43	101
44	102
45	103
46	104
47	105
48	106
49	107
50	108
51	109
52	111
53	112
54	113
55	114
56	115
57	116
58	117
59	119
60	120
61	121
62	122
63	123
64	124