A344276 - cp's OEIS frontend

A344276 Number of halving and tripling steps to reach 3 in the '3x+3' problem, or -1 if 3 is never reached.

n	a(n)
1	2
2	3
3	0
4	4
5	9
6	1
7	4
8	5
9	7
10	10
11	10
12	2
13	18
14	5
15	5
16	6
17	21
18	8
19	8
20	11
21	16
22	11
23	11
24	3
25	11
26	19
27	19
28	6
29	19
30	6
31	6
32	7
33	14
34	22
35	22
36	9
37	22
38	9
39	9
40	12
41	9
42	17
43	17
44	12
45	17
46	12
47	12
48	4
49	25
50	12
51	12
52	20
53	113
54	20
55	20
56	7
57	20
58	20
59	20
60	7
61	108
62	7
63	7
64	8
65	28
66	15
67	15
68	23
69	15
70	23
71	23
72	10

[2, 3, 0, 4, 9, 1, 4, 5, 7, 10, 10, 2, 18, 5, 5, 6, 21, 8, 8, 11, 16, 11, 11, 3, 11, 19, 19, 6, 19, 6, 6, 7, 14, 22, 22, 9, 22, 9, 9, 12, 9, 17, 17, 12, 17, 12, 12, 4, 25, 12, 12, 20, 113, 20, 20, 7, 20, 20, 20, 7, 108, 7, 7, 8, 28, 15, 15, 23, 15, 23, 23, 10]

cp's OEIS Frontend

A344276 Number of halving and tripling steps to reach 3 in the '3x+3' problem, or -1 if 3 is never reached.

Table of values

List of values

n	a(n)
1	2
2	3
3	0
4	4
5	9
6	1
7	4
8	5
9	7
10	10
11	10
12	2
13	18
14	5
15	5
16	6
17	21
18	8
19	8
20	11
21	16
22	11
23	11
24	3
25	11
26	19
27	19
28	6
29	19
30	6
31	6
32	7
33	14
34	22
35	22
36	9
37	22
38	9
39	9
40	12
41	9
42	17
43	17
44	12
45	17
46	12
47	12
48	4
49	25
50	12
51	12
52	20
53	113
54	20
55	20
56	7
57	20
58	20
59	20
60	7
61	108
62	7
63	7
64	8
65	28
66	15
67	15
68	23
69	15
70	23
71	23
72	10

n	a(n)
1	2
2	3
3	0
4	4
5	9
6	1
7	4
8	5
9	7
10	10
11	10
12	2
13	18
14	5
15	5
16	6
17	21
18	8
19	8
20	11
21	16
22	11
23	11
24	3
25	11
26	19
27	19
28	6
29	19
30	6
31	6
32	7
33	14
34	22
35	22
36	9
37	22
38	9
39	9
40	12
41	9
42	17
43	17
44	12
45	17
46	12
47	12
48	4
49	25
50	12
51	12
52	20
53	113
54	20
55	20
56	7
57	20
58	20
59	20
60	7
61	108
62	7
63	7
64	8
65	28
66	15
67	15
68	23
69	15
70	23
71	23
72	10

n	a(n)
1	2
2	3
3	0
4	4
5	9
6	1
7	4
8	5
9	7
10	10
11	10
12	2
13	18
14	5
15	5
16	6
17	21
18	8
19	8
20	11
21	16
22	11
23	11
24	3
25	11
26	19
27	19
28	6
29	19
30	6
31	6
32	7
33	14
34	22
35	22
36	9
37	22
38	9
39	9
40	12
41	9
42	17
43	17
44	12
45	17
46	12
47	12
48	4
49	25
50	12
51	12
52	20
53	113
54	20
55	20
56	7
57	20
58	20
59	20
60	7
61	108
62	7
63	7
64	8
65	28
66	15
67	15
68	23
69	15
70	23
71	23
72	10