A087974 - cp's OEIS frontend

A087974 Largest value of number of distinct prime factors arising in the 3x+1 iteration trajectory started with n.

n	a(n)
1	0
2	1
3	2
4	1
5	1
6	2
7	2
8	1
9	2
10	2
11	2
12	2
13	2
14	2
15	3
16	1
17	2
18	2
19	2
20	2
21	2
22	2
23	3
24	2
25	2
26	2
27	3
28	2
29	2
30	3
31	3
32	1
33	2
34	2
35	2
36	2
37	2
38	2
39	2
40	2
41	3
42	3
43	3
44	2
45	2
46	3
47	3
48	2
49	2
50	2
51	3
52	2
53	2
54	3
55	3
56	2
57	3
58	2
59	2
60	3
61	3
62	3
63	3
64	1
65	2
66	3
67	2
68	2
69	2
70	3
71	3
72	2
73	3
74	2
75	3
76	2
77	2
78	3
79	3
80	2
81	3
82	3
83	3
84	3
85	2
86	3
87	2
88	2
89	2
90	3
91	3
92	3
93	3
94	3
95	3
96	2
97	3
98	2
99	2
100	2
101	2
102	3
103	3
104	2
105	3

[0, 1, 2, 1, 1, 2, 2, 1, 2, 2, 2, 2, 2, 2, 3, 1, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 3, 2, 2, 3, 3, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 2, 2, 3, 3, 2, 2, 2, 3, 2, 2, 3, 3, 2, 3, 2, 2, 3, 3, 3, 3, 1, 2, 3, 2, 2, 2, 3, 3, 2, 3, 2, 3, 2, 2, 3, 3, 2, 3, 3, 3, 3, 2, 3, 2, 2, 2, 3, 3, 3, 3, 3, 3, 2, 3, 2, 2, 2, 2, 3, 3, 2, 3]

cp's OEIS Frontend

A087974 Largest value of number of distinct prime factors arising in the 3x+1 iteration trajectory started with n.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	1
5	1
6	2
7	2
8	1
9	2
10	2
11	2
12	2
13	2
14	2
15	3
16	1
17	2
18	2
19	2
20	2
21	2
22	2
23	3
24	2
25	2
26	2
27	3
28	2
29	2
30	3
31	3
32	1
33	2
34	2
35	2
36	2
37	2
38	2
39	2
40	2
41	3
42	3
43	3
44	2
45	2
46	3
47	3
48	2
49	2
50	2
51	3
52	2
53	2
54	3
55	3
56	2
57	3
58	2
59	2
60	3
61	3
62	3
63	3
64	1
65	2
66	3
67	2
68	2
69	2
70	3
71	3
72	2
73	3
74	2
75	3
76	2
77	2
78	3
79	3
80	2
81	3
82	3
83	3
84	3
85	2
86	3
87	2
88	2
89	2
90	3
91	3
92	3
93	3
94	3
95	3
96	2
97	3
98	2
99	2
100	2
101	2
102	3
103	3
104	2
105	3

n	a(n)
1	0
2	1
3	2
4	1
5	1
6	2
7	2
8	1
9	2
10	2
11	2
12	2
13	2
14	2
15	3
16	1
17	2
18	2
19	2
20	2
21	2
22	2
23	3
24	2
25	2
26	2
27	3
28	2
29	2
30	3
31	3
32	1
33	2
34	2
35	2
36	2
37	2
38	2
39	2
40	2
41	3
42	3
43	3
44	2
45	2
46	3
47	3
48	2
49	2
50	2
51	3
52	2
53	2
54	3
55	3
56	2
57	3
58	2
59	2
60	3
61	3
62	3
63	3
64	1
65	2
66	3
67	2
68	2
69	2
70	3
71	3
72	2
73	3
74	2
75	3
76	2
77	2
78	3
79	3
80	2
81	3
82	3
83	3
84	3
85	2
86	3
87	2
88	2
89	2
90	3
91	3
92	3
93	3
94	3
95	3
96	2
97	3
98	2
99	2
100	2
101	2
102	3
103	3
104	2
105	3

n	a(n)
1	0
2	1
3	2
4	1
5	1
6	2
7	2
8	1
9	2
10	2
11	2
12	2
13	2
14	2
15	3
16	1
17	2
18	2
19	2
20	2
21	2
22	2
23	3
24	2
25	2
26	2
27	3
28	2
29	2
30	3
31	3
32	1
33	2
34	2
35	2
36	2
37	2
38	2
39	2
40	2
41	3
42	3
43	3
44	2
45	2
46	3
47	3
48	2
49	2
50	2
51	3
52	2
53	2
54	3
55	3
56	2
57	3
58	2
59	2
60	3
61	3
62	3
63	3
64	1
65	2
66	3
67	2
68	2
69	2
70	3
71	3
72	2
73	3
74	2
75	3
76	2
77	2
78	3
79	3
80	2
81	3
82	3
83	3
84	3
85	2
86	3
87	2
88	2
89	2
90	3
91	3
92	3
93	3
94	3
95	3
96	2
97	3
98	2
99	2
100	2
101	2
102	3
103	3
104	2
105	3