A120688 - cp's OEIS frontend

A120688 Integers m such that the sequence defined by f(0)=m and f(n+1)=2+gpf(f(n)), with gpf(n) being the greatest prime factor of n (A006530), ends up in the period 3 cycle 9 -> 5 -> 7 -> 9 -> ...

n	a(n)
0	3
1	6
2	9
3	12
4	13
5	17
6	18
7	23
8	24
9	26
10	27
11	29
12	34
13	36
14	39
15	43
16	46
17	48
18	51
19	52
20	54
21	58
22	59
23	65
24	68
25	69
26	72
27	73
28	78
29	81
30	85
31	86
32	87
33	91
34	92
35	96
36	101
37	102
38	104
39	107
40	108
41	115
42	116
43	117
44	118
45	119
46	129
47	130
48	131
49	136
50	138
51	139
52	143
53	144
54	145
55	146
56	153
57	156
58	157
59	161
60	162

[3, 6, 9, 12, 13, 17, 18, 23, 24, 26, 27, 29, 34, 36, 39, 43, 46, 48, 51, 52, 54, 58, 59, 65, 68, 69, 72, 73, 78, 81, 85, 86, 87, 91, 92, 96, 101, 102, 104, 107, 108, 115, 116, 117, 118, 119, 129, 130, 131, 136, 138, 139, 143, 144, 145, 146, 153, 156, 157, 161, 162]

cp's OEIS Frontend

A120688 Integers m such that the sequence defined by f(0)=m and f(n+1)=2+gpf(f(n)), with gpf(n) being the greatest prime factor of n (A006530), ends up in the period 3 cycle 9 -> 5 -> 7 -> 9 -> ...

Table of values

List of values

n	a(n)
0	3
1	6
2	9
3	12
4	13
5	17
6	18
7	23
8	24
9	26
10	27
11	29
12	34
13	36
14	39
15	43
16	46
17	48
18	51
19	52
20	54
21	58
22	59
23	65
24	68
25	69
26	72
27	73
28	78
29	81
30	85
31	86
32	87
33	91
34	92
35	96
36	101
37	102
38	104
39	107
40	108
41	115
42	116
43	117
44	118
45	119
46	129
47	130
48	131
49	136
50	138
51	139
52	143
53	144
54	145
55	146
56	153
57	156
58	157
59	161
60	162

n	a(n)
0	3
1	6
2	9
3	12
4	13
5	17
6	18
7	23
8	24
9	26
10	27
11	29
12	34
13	36
14	39
15	43
16	46
17	48
18	51
19	52
20	54
21	58
22	59
23	65
24	68
25	69
26	72
27	73
28	78
29	81
30	85
31	86
32	87
33	91
34	92
35	96
36	101
37	102
38	104
39	107
40	108
41	115
42	116
43	117
44	118
45	119
46	129
47	130
48	131
49	136
50	138
51	139
52	143
53	144
54	145
55	146
56	153
57	156
58	157
59	161
60	162

n	a(n)
0	3
1	6
2	9
3	12
4	13
5	17
6	18
7	23
8	24
9	26
10	27
11	29
12	34
13	36
14	39
15	43
16	46
17	48
18	51
19	52
20	54
21	58
22	59
23	65
24	68
25	69
26	72
27	73
28	78
29	81
30	85
31	86
32	87
33	91
34	92
35	96
36	101
37	102
38	104
39	107
40	108
41	115
42	116
43	117
44	118
45	119
46	129
47	130
48	131
49	136
50	138
51	139
52	143
53	144
54	145
55	146
56	153
57	156
58	157
59	161
60	162