A337144 - cp's OEIS frontend

A337144 n is the a(n)-th positive integer which takes its number of steps to reach 1 in the Collatz (or 3x+1) problem.

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

[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 2, 2, 3, 1, 2, 1, 1, 2, 1, 1, 2, 3, 1, 2, 1, 1, 2, 1, 2, 3, 1, 2, 1, 3, 1, 2, 3, 4, 1, 1, 1, 2, 3, 2, 3, 1, 2, 2, 1, 3, 2, 4, 5, 1, 2, 2, 1, 2, 3, 2, 3, 4, 1, 1, 1, 2, 5, 3, 4, 1, 2, 3, 5, 1, 2, 4, 5, 1, 2]

cp's OEIS Frontend

A337144 n is the a(n)-th positive integer which takes its number of steps to reach 1 in the Collatz (or 3x+1) problem.

Table of values

List of values

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

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

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