A220071 - cp's OEIS frontend

A220071 Difference between number of halving steps and number of tripling steps needed to reach 1 in '3x+1' problem.

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

[0, 1, 3, 2, 3, 4, 6, 3, 7, 4, 6, 5, 5, 7, 7, 4, 6, 8, 8, 5, 5, 7, 7, 6, 9, 6, 29, 8, 8, 8, 28, 5, 10, 7, 7, 9, 9, 9, 12, 6, 29, 6, 11, 8, 8, 8, 28, 7, 10, 10, 10, 7, 7, 30, 30, 9, 12, 9, 12, 9, 9, 29, 29, 6, 11, 11, 11, 8, 8, 8, 28, 10, 31, 10, 8, 10, 10, 13]

cp's OEIS Frontend

A220071 Difference between number of halving steps and number of tripling steps needed to reach 1 in '3x+1' problem.

Table of values

List of values

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

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

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