A299963 - cp's OEIS frontend

A299963 a(n) = greatest prime factor of the terms in the Collatz sequence starting at n; a(1) = 1.

n	a(n)
1	1
2	2
3	5
4	2
5	5
6	5
7	17
8	2
9	17
10	5
11	17
12	5
13	13
14	17
15	53
16	2
17	17
18	17
19	29
20	5
21	7
22	17
23	53
24	5
25	29
26	13
27	1619
28	17
29	29
30	53
31	1619
32	2
33	29
34	17
35	53
36	17
37	37
38	29
39	101
40	5
41	1619
42	7
43	43
44	17
45	17
46	53
47	1619
48	5
49	37
50	29
51	29
52	13
53	53
54	1619
55	1619
56	17
57	43
58	29
59	101
60	53
61	61
62	1619
63	1619
64	2
65	37

[1, 2, 5, 2, 5, 5, 17, 2, 17, 5, 17, 5, 13, 17, 53, 2, 17, 17, 29, 5, 7, 17, 53, 5, 29, 13, 1619, 17, 29, 53, 1619, 2, 29, 17, 53, 17, 37, 29, 101, 5, 1619, 7, 43, 17, 17, 53, 1619, 5, 37, 29, 29, 13, 53, 1619, 1619, 17, 43, 29, 101, 53, 61, 1619, 1619, 2, 37]

cp's OEIS Frontend

A299963 a(n) = greatest prime factor of the terms in the Collatz sequence starting at n; a(1) = 1.

Table of values

List of values