A070974 - cp's OEIS frontend

A070974 Number of steps to reach 1 in `3x+1' (or Collatz) problem starting with n!.

n	a(n)
1	0
2	1
3	8
4	10
5	20
6	20
7	41
8	44
9	86
10	66
11	147
12	210
13	175
14	264
15	255
16	259
17	426
18	425
19	362
20	387
21	500
22	489
23	447
24	449
25	389
26	559
27	419
28	517
29	633
30	444
31	529
32	534
33	795
34	950
35	826
36	813
37	1069
38	689
39	728
40	785
41	909
42	819
43	1013
44	1171
45	1218
46	996
47	1327
48	1330
49	891
50	1295
51	1342
52	1402

[0, 1, 8, 10, 20, 20, 41, 44, 86, 66, 147, 210, 175, 264, 255, 259, 426, 425, 362, 387, 500, 489, 447, 449, 389, 559, 419, 517, 633, 444, 529, 534, 795, 950, 826, 813, 1069, 689, 728, 785, 909, 819, 1013, 1171, 1218, 996, 1327, 1330, 891, 1295, 1342, 1402]

cp's OEIS Frontend

A070974 Number of steps to reach 1 in `3x+1' (or Collatz) problem starting with n!.

Table of values

List of values