A077090 - cp's OEIS frontend

A077090 When iteration of f(x) = phi(sigma(x) - phi(x)) is started at initial values listed here it ends up in a cycle of length greater than 1.

n	a(n)
1	36
2	40
3	48
4	50
5	52
6	60
7	64
8	66
9	72
10	76
11	78
12	80
13	81
14	84
15	88
16	90
17	92
18	96
19	98
20	100
21	102
22	105
23	106
24	108
25	110
26	112
27	114
28	116
29	117
30	118
31	120
32	122
33	123
34	124
35	126
36	128
37	130
38	132
39	135
40	136
41	138
42	140
43	141
44	142
45	144
46	146
47	147
48	148
49	150
50	152
51	154
52	156
53	159
54	160
55	162
56	164

[36, 40, 48, 50, 52, 60, 64, 66, 72, 76, 78, 80, 81, 84, 88, 90, 92, 96, 98, 100, 102, 105, 106, 108, 110, 112, 114, 116, 117, 118, 120, 122, 123, 124, 126, 128, 130, 132, 135, 136, 138, 140, 141, 142, 144, 146, 147, 148, 150, 152, 154, 156, 159, 160, 162, 164]

cp's OEIS Frontend

A077090 When iteration of f(x) = phi(sigma(x) - phi(x)) is started at initial values listed here it ends up in a cycle of length greater than 1.

Table of values

List of values

n	a(n)
1	36
2	40
3	48
4	50
5	52
6	60
7	64
8	66
9	72
10	76
11	78
12	80
13	81
14	84
15	88
16	90
17	92
18	96
19	98
20	100
21	102
22	105
23	106
24	108
25	110
26	112
27	114
28	116
29	117
30	118
31	120
32	122
33	123
34	124
35	126
36	128
37	130
38	132
39	135
40	136
41	138
42	140
43	141
44	142
45	144
46	146
47	147
48	148
49	150
50	152
51	154
52	156
53	159
54	160
55	162
56	164

n	a(n)
1	36
2	40
3	48
4	50
5	52
6	60
7	64
8	66
9	72
10	76
11	78
12	80
13	81
14	84
15	88
16	90
17	92
18	96
19	98
20	100
21	102
22	105
23	106
24	108
25	110
26	112
27	114
28	116
29	117
30	118
31	120
32	122
33	123
34	124
35	126
36	128
37	130
38	132
39	135
40	136
41	138
42	140
43	141
44	142
45	144
46	146
47	147
48	148
49	150
50	152
51	154
52	156
53	159
54	160
55	162
56	164

n	a(n)
1	36
2	40
3	48
4	50
5	52
6	60
7	64
8	66
9	72
10	76
11	78
12	80
13	81
14	84
15	88
16	90
17	92
18	96
19	98
20	100
21	102
22	105
23	106
24	108
25	110
26	112
27	114
28	116
29	117
30	118
31	120
32	122
33	123
34	124
35	126
36	128
37	130
38	132
39	135
40	136
41	138
42	140
43	141
44	142
45	144
46	146
47	147
48	148
49	150
50	152
51	154
52	156
53	159
54	160
55	162
56	164