A210688 - cp's OEIS frontend

A210688 The length of the Collatz (3k+1) sequence for all odd fractions and integers.

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

[1, 2, 3, 8, 4, 4, 3, 1, 4, 7, 6, 5, 16, 8, 6, 9, 10, 4, 12, 7, 8, 17, 2, 1, 9, 3, 8, 5, 4, 5, 17, 6, 8, 26, 5, 18, 20, 6, 14, 13, 7, 8, 18, 19, 9, 7, 8, 4, 1, 4, 23, 5, 4, 9, 32, 15, 11, 7, 10, 12, 27, 13, 20, 22, 33, 11, 10, 11, 2, 32, 9, 8, 19, 3, 9, 17, 12]

cp's OEIS Frontend

A210688 The length of the Collatz (3k+1) sequence for all odd fractions and integers.

Table of values

List of values

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

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

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