A332452 - cp's OEIS frontend

A332452 Starting from sigma(n), number of halving steps to reach 1 in '3x+1' problem, or -1 if this never happens.

n	a(n)
1	0
2	5
3	2
4	11
5	6
6	7
7	3
8	12
9	7
10	14
11	7
12	13
13	12
14	8
15	8
16	67
17	14
18	23
19	6
20	7
21	5
22	15
23	8
24	14
25	67
26	7
27	7
28	14
29	13
30	16
31	5
32	68
33	9
34	71
35	9
36	59
37	15
38	14
39	14
40	13
41	7
42	10
43	12
44	8
45	24
46	16
47	9
48	69
49	22
50	13
51	16
52	18
53	71
54	15
55	16
56	15
57	8
58	13
59	14
60	9
61	68
62	10
63	10
64	31
65	8
66	17
67	11
68	69
69	10
70	17
71	16
72	76
73	16
74	23
75	69
76	12
77	10
78	9
79	8
80	14
81	61
82	69
83	8
84	16
85	72
86	20
87	15
88	14
89	13
90	16
91	15
92	9
93	7
94	17

[0, 5, 2, 11, 6, 7, 3, 12, 7, 14, 7, 13, 12, 8, 8, 67, 14, 23, 6, 7, 5, 15, 8, 14, 67, 7, 7, 14, 13, 16, 5, 68, 9, 71, 9, 59, 15, 14, 14, 13, 7, 10, 12, 8, 24, 16, 9, 69, 22, 13, 16, 18, 71, 15, 16, 15, 8, 13, 14, 9, 68, 10, 10, 31, 8, 17, 11, 69, 10, 17, 16, 76, 16, 23, 69, 12, 10, 9, 8, 14, 61, 69, 8, 16, 72, 20, 15, 14, 13, 16, 15, 9, 7, 17]

cp's OEIS Frontend

A332452 Starting from sigma(n), number of halving steps to reach 1 in '3x+1' problem, or -1 if this never happens.

Table of values

List of values

n	a(n)
1	0
2	5
3	2
4	11
5	6
6	7
7	3
8	12
9	7
10	14
11	7
12	13
13	12
14	8
15	8
16	67
17	14
18	23
19	6
20	7
21	5
22	15
23	8
24	14
25	67
26	7
27	7
28	14
29	13
30	16
31	5
32	68
33	9
34	71
35	9
36	59
37	15
38	14
39	14
40	13
41	7
42	10
43	12
44	8
45	24
46	16
47	9
48	69
49	22
50	13
51	16
52	18
53	71
54	15
55	16
56	15
57	8
58	13
59	14
60	9
61	68
62	10
63	10
64	31
65	8
66	17
67	11
68	69
69	10
70	17
71	16
72	76
73	16
74	23
75	69
76	12
77	10
78	9
79	8
80	14
81	61
82	69
83	8
84	16
85	72
86	20
87	15
88	14
89	13
90	16
91	15
92	9
93	7
94	17

n	a(n)
1	0
2	5
3	2
4	11
5	6
6	7
7	3
8	12
9	7
10	14
11	7
12	13
13	12
14	8
15	8
16	67
17	14
18	23
19	6
20	7
21	5
22	15
23	8
24	14
25	67
26	7
27	7
28	14
29	13
30	16
31	5
32	68
33	9
34	71
35	9
36	59
37	15
38	14
39	14
40	13
41	7
42	10
43	12
44	8
45	24
46	16
47	9
48	69
49	22
50	13
51	16
52	18
53	71
54	15
55	16
56	15
57	8
58	13
59	14
60	9
61	68
62	10
63	10
64	31
65	8
66	17
67	11
68	69
69	10
70	17
71	16
72	76
73	16
74	23
75	69
76	12
77	10
78	9
79	8
80	14
81	61
82	69
83	8
84	16
85	72
86	20
87	15
88	14
89	13
90	16
91	15
92	9
93	7
94	17

n	a(n)
1	0
2	5
3	2
4	11
5	6
6	7
7	3
8	12
9	7
10	14
11	7
12	13
13	12
14	8
15	8
16	67
17	14
18	23
19	6
20	7
21	5
22	15
23	8
24	14
25	67
26	7
27	7
28	14
29	13
30	16
31	5
32	68
33	9
34	71
35	9
36	59
37	15
38	14
39	14
40	13
41	7
42	10
43	12
44	8
45	24
46	16
47	9
48	69
49	22
50	13
51	16
52	18
53	71
54	15
55	16
56	15
57	8
58	13
59	14
60	9
61	68
62	10
63	10
64	31
65	8
66	17
67	11
68	69
69	10
70	17
71	16
72	76
73	16
74	23
75	69
76	12
77	10
78	9
79	8
80	14
81	61
82	69
83	8
84	16
85	72
86	20
87	15
88	14
89	13
90	16
91	15
92	9
93	7
94	17