A087228 - cp's OEIS frontend

A087228 a(n) is the smallest number k such that the LCM of the terms of the Collatz trajectory of k has n distinct prime factors.

n	a(n)
1	2
2	5
3	3
4	17
5	11
6	7
7	9
8	33
9	67
10	57
11	59
12	39
13	105
14	185
15	191
16	123
17	225
18	219
19	239
20	159
21	319
22	283
23	251
24	167
25	335
26	111
27	297
28	175
29	233
30	155
31	103
32	91
33	107
34	71
35	31
36	41
37	27
38	193
39	129
40	231
41	171
42	463
43	327
44	411
45	859
46	731
47	487
48	649
49	639
50	1153
51	1563
52	1607
53	1071
54	1215
55	1307
56	871
57	1161

[2, 5, 3, 17, 11, 7, 9, 33, 67, 57, 59, 39, 105, 185, 191, 123, 225, 219, 239, 159, 319, 283, 251, 167, 335, 111, 297, 175, 233, 155, 103, 91, 107, 71, 31, 41, 27, 193, 129, 231, 171, 463, 327, 411, 859, 731, 487, 649, 639, 1153, 1563, 1607, 1071, 1215, 1307, 871, 1161]

cp's OEIS Frontend

A087228 a(n) is the smallest number k such that the LCM of the terms of the Collatz trajectory of k has n distinct prime factors.

Table of values

List of values