A332453 - cp's OEIS frontend

A332453 Starting from sigma(n), number of tripling steps to reach 1 in '3x+1' problem, or -1 if 1 is never reached.

n	a(n)
1	0
2	2
3	0
4	5
5	2
6	2
7	0
8	5
9	2
10	6
11	2
12	5
13	5
14	2
15	2
16	39
17	6
18	11
19	1
20	1
21	0
22	6
23	2
24	5
25	39
26	1
27	1
28	5
29	5
30	6
31	0
32	39
33	2
34	41
35	2
36	33
37	6
38	5
39	5
40	4
41	1
42	2
43	4
44	1
45	11
46	6
47	2
48	39
49	10
50	4
51	6
52	7
53	41
54	5
55	6
56	5
57	1
58	4
59	5
60	1
61	39
62	2
63	2
64	15
65	1
66	6
67	3
68	39
69	2
70	6
71	6
72	43
73	6
74	10
75	39
76	3
77	2
78	1
79	1
80	4
81	34
82	39
83	1
84	5
85	41
86	8
87	5
88	4
89	4
90	5
91	5
92	1
93	0
94	6
95	5
96	39
97	7
98	45
99	11
100	7
101	7
102	41
103	2
104	12
105	2

[0, 2, 0, 5, 2, 2, 0, 5, 2, 6, 2, 5, 5, 2, 2, 39, 6, 11, 1, 1, 0, 6, 2, 5, 39, 1, 1, 5, 5, 6, 0, 39, 2, 41, 2, 33, 6, 5, 5, 4, 1, 2, 4, 1, 11, 6, 2, 39, 10, 4, 6, 7, 41, 5, 6, 5, 1, 4, 5, 1, 39, 2, 2, 15, 1, 6, 3, 39, 2, 6, 6, 43, 6, 10, 39, 3, 2, 1, 1, 4, 34, 39, 1, 5, 41, 8, 5, 4, 4, 5, 5, 1, 0, 6, 5, 39, 7, 45, 11, 7, 7, 41, 2, 12, 2]

cp's OEIS Frontend

A332453 Starting from sigma(n), number of tripling steps to reach 1 in '3x+1' problem, or -1 if 1 is never reached.

Table of values

List of values

n	a(n)
1	0
2	2
3	0
4	5
5	2
6	2
7	0
8	5
9	2
10	6
11	2
12	5
13	5
14	2
15	2
16	39
17	6
18	11
19	1
20	1
21	0
22	6
23	2
24	5
25	39
26	1
27	1
28	5
29	5
30	6
31	0
32	39
33	2
34	41
35	2
36	33
37	6
38	5
39	5
40	4
41	1
42	2
43	4
44	1
45	11
46	6
47	2
48	39
49	10
50	4
51	6
52	7
53	41
54	5
55	6
56	5
57	1
58	4
59	5
60	1
61	39
62	2
63	2
64	15
65	1
66	6
67	3
68	39
69	2
70	6
71	6
72	43
73	6
74	10
75	39
76	3
77	2
78	1
79	1
80	4
81	34
82	39
83	1
84	5
85	41
86	8
87	5
88	4
89	4
90	5
91	5
92	1
93	0
94	6
95	5
96	39
97	7
98	45
99	11
100	7
101	7
102	41
103	2
104	12
105	2

n	a(n)
1	0
2	2
3	0
4	5
5	2
6	2
7	0
8	5
9	2
10	6
11	2
12	5
13	5
14	2
15	2
16	39
17	6
18	11
19	1
20	1
21	0
22	6
23	2
24	5
25	39
26	1
27	1
28	5
29	5
30	6
31	0
32	39
33	2
34	41
35	2
36	33
37	6
38	5
39	5
40	4
41	1
42	2
43	4
44	1
45	11
46	6
47	2
48	39
49	10
50	4
51	6
52	7
53	41
54	5
55	6
56	5
57	1
58	4
59	5
60	1
61	39
62	2
63	2
64	15
65	1
66	6
67	3
68	39
69	2
70	6
71	6
72	43
73	6
74	10
75	39
76	3
77	2
78	1
79	1
80	4
81	34
82	39
83	1
84	5
85	41
86	8
87	5
88	4
89	4
90	5
91	5
92	1
93	0
94	6
95	5
96	39
97	7
98	45
99	11
100	7
101	7
102	41
103	2
104	12
105	2

n	a(n)
1	0
2	2
3	0
4	5
5	2
6	2
7	0
8	5
9	2
10	6
11	2
12	5
13	5
14	2
15	2
16	39
17	6
18	11
19	1
20	1
21	0
22	6
23	2
24	5
25	39
26	1
27	1
28	5
29	5
30	6
31	0
32	39
33	2
34	41
35	2
36	33
37	6
38	5
39	5
40	4
41	1
42	2
43	4
44	1
45	11
46	6
47	2
48	39
49	10
50	4
51	6
52	7
53	41
54	5
55	6
56	5
57	1
58	4
59	5
60	1
61	39
62	2
63	2
64	15
65	1
66	6
67	3
68	39
69	2
70	6
71	6
72	43
73	6
74	10
75	39
76	3
77	2
78	1
79	1
80	4
81	34
82	39
83	1
84	5
85	41
86	8
87	5
88	4
89	4
90	5
91	5
92	1
93	0
94	6
95	5
96	39
97	7
98	45
99	11
100	7
101	7
102	41
103	2
104	12
105	2