A095386 - cp's OEIS frontend

A095386 Largest prime factor of peak values of 3x+1 trajectory started at n.

n	a(n)
2	2
3	2
4	2
5	2
6	2
7	13
8	2
9	13
10	2
11	13
12	2
13	5
14	13
15	5
16	2
17	13
18	13
19	11
20	5
21	2
22	13
23	5
24	3
25	11
26	5
27	577
28	13
29	11
30	5
31	577
32	2
33	5
34	13
35	5
36	13
37	7
38	11
39	19
40	5
41	577
42	2
43	7
44	13
45	17
46	5
47	577
48	3
49	37
50	11
51	29
52	13
53	5
54	577
55	577
56	7
57	7
58	11
59	19
60	5
61	23
62	577
63	577
64	2
65	7
66	5
67	19
68	17
69	13
70	5
71	577
72	3
73	577
74	7
75	17
76	11
77	29
78	19
79	101
80	5

[2, 2, 2, 2, 2, 13, 2, 13, 2, 13, 2, 5, 13, 5, 2, 13, 13, 11, 5, 2, 13, 5, 3, 11, 5, 577, 13, 11, 5, 577, 2, 5, 13, 5, 13, 7, 11, 19, 5, 577, 2, 7, 13, 17, 5, 577, 3, 37, 11, 29, 13, 5, 577, 577, 7, 7, 11, 19, 5, 23, 577, 577, 2, 7, 5, 19, 17, 13, 5, 577, 3, 577, 7, 17, 11, 29, 19, 101, 5]

cp's OEIS Frontend

A095386 Largest prime factor of peak values of 3x+1 trajectory started at n.

Table of values

List of values

n	a(n)
2	2
3	2
4	2
5	2
6	2
7	13
8	2
9	13
10	2
11	13
12	2
13	5
14	13
15	5
16	2
17	13
18	13
19	11
20	5
21	2
22	13
23	5
24	3
25	11
26	5
27	577
28	13
29	11
30	5
31	577
32	2
33	5
34	13
35	5
36	13
37	7
38	11
39	19
40	5
41	577
42	2
43	7
44	13
45	17
46	5
47	577
48	3
49	37
50	11
51	29
52	13
53	5
54	577
55	577
56	7
57	7
58	11
59	19
60	5
61	23
62	577
63	577
64	2
65	7
66	5
67	19
68	17
69	13
70	5
71	577
72	3
73	577
74	7
75	17
76	11
77	29
78	19
79	101
80	5

n	a(n)
2	2
3	2
4	2
5	2
6	2
7	13
8	2
9	13
10	2
11	13
12	2
13	5
14	13
15	5
16	2
17	13
18	13
19	11
20	5
21	2
22	13
23	5
24	3
25	11
26	5
27	577
28	13
29	11
30	5
31	577
32	2
33	5
34	13
35	5
36	13
37	7
38	11
39	19
40	5
41	577
42	2
43	7
44	13
45	17
46	5
47	577
48	3
49	37
50	11
51	29
52	13
53	5
54	577
55	577
56	7
57	7
58	11
59	19
60	5
61	23
62	577
63	577
64	2
65	7
66	5
67	19
68	17
69	13
70	5
71	577
72	3
73	577
74	7
75	17
76	11
77	29
78	19
79	101
80	5

n	a(n)
2	2
3	2
4	2
5	2
6	2
7	13
8	2
9	13
10	2
11	13
12	2
13	5
14	13
15	5
16	2
17	13
18	13
19	11
20	5
21	2
22	13
23	5
24	3
25	11
26	5
27	577
28	13
29	11
30	5
31	577
32	2
33	5
34	13
35	5
36	13
37	7
38	11
39	19
40	5
41	577
42	2
43	7
44	13
45	17
46	5
47	577
48	3
49	37
50	11
51	29
52	13
53	5
54	577
55	577
56	7
57	7
58	11
59	19
60	5
61	23
62	577
63	577
64	2
65	7
66	5
67	19
68	17
69	13
70	5
71	577
72	3
73	577
74	7
75	17
76	11
77	29
78	19
79	101
80	5