A074473 - cp's OEIS frontend

A074473 Dropping time for the 3x+1 problem: for n >= 2, number of iteration that first becomes smaller than the initial value if Collatz-function (A006370) is iterated starting at n; a(1)=1 by convention.

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

[1, 2, 7, 2, 4, 2, 12, 2, 4, 2, 9, 2, 4, 2, 12, 2, 4, 2, 7, 2, 4, 2, 9, 2, 4, 2, 97, 2, 4, 2, 92, 2, 4, 2, 7, 2, 4, 2, 14, 2, 4, 2, 9, 2, 4, 2, 89, 2, 4, 2, 7, 2, 4, 2, 9, 2, 4, 2, 12, 2, 4, 2, 89, 2, 4, 2, 7, 2, 4, 2, 84, 2, 4, 2, 9, 2, 4, 2, 14, 2, 4, 2, 7, 2, 4, 2, 9, 2, 4, 2, 74, 2, 4, 2, 14, 2, 4, 2, 7]

cp's OEIS Frontend

A074473 Dropping time for the 3x+1 problem: for n >= 2, number of iteration that first becomes smaller than the initial value if Collatz-function (A006370) is iterated starting at n; a(1)=1 by convention.

Table of values

List of values

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

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

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