A378833 - cp's OEIS frontend

A378833 Number of tripling steps in the 3x-1 trajectory from n to the minimum of its cycle, or -1 if n never reaches a cycle.

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

[0, 0, 1, 0, 0, 1, 1, 0, 4, 0, 1, 1, 3, 1, 2, 0, 0, 4, 2, 0, 3, 1, 1, 1, 6, 3, 1, 1, 2, 2, 2, 0, 7, 0, 4, 4, 5, 2, 3, 0, 3, 3, 1, 1, 8, 1, 5, 1, 6, 6, 3, 3, 4, 1, 4, 1, 9, 2, 2, 2, 2, 2, 6, 0, 12, 7, 7, 0, 5, 4, 5, 4, 5, 5, 2, 2, 3, 3, 3, 0, 7, 3, 3, 3, 8, 1, 13]

cp's OEIS Frontend

A378833 Number of tripling steps in the 3x-1 trajectory from n to the minimum of its cycle, or -1 if n never reaches a cycle.

Table of values

List of values

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

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

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