A240975 - cp's OEIS frontend

A240975 The number of distinct prime factors of n^3-1.

n	a(n)
1	0
2	1
3	2
4	2
5	2
6	2
7	3
8	2
9	3
10	2
11	4
12	2
13	3
14	2
15	3
16	4
17	2
18	2
19	3
20	2
21	3
22	3
23	4
24	2
25	4
26	3
27	3
28	2
29	4
30	3
31	4
32	3
33	2
34	3
35	4
36	4
37	4
38	2
39	4
40	3
41	3
42	3
43	4
44	3
45	4
46	4
47	4
48	3
49	4
50	2
51	4
52	3
53	4
54	2
55	4
56	4
57	3
58	4
59	3
60	3
61	5
62	2
63	4
64	4
65	3
66	3
67	5
68	3
69	3
70	3
71	4
72	3
73	3
74	4
75	3
76	3
77	3
78	3
79	5
80	2

[0, 1, 2, 2, 2, 2, 3, 2, 3, 2, 4, 2, 3, 2, 3, 4, 2, 2, 3, 2, 3, 3, 4, 2, 4, 3, 3, 2, 4, 3, 4, 3, 2, 3, 4, 4, 4, 2, 4, 3, 3, 3, 4, 3, 4, 4, 4, 3, 4, 2, 4, 3, 4, 2, 4, 4, 3, 4, 3, 3, 5, 2, 4, 4, 3, 3, 5, 3, 3, 3, 4, 3, 3, 4, 3, 3, 3, 3, 5, 2]

cp's OEIS Frontend

A240975 The number of distinct prime factors of n^3-1.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	2
5	2
6	2
7	3
8	2
9	3
10	2
11	4
12	2
13	3
14	2
15	3
16	4
17	2
18	2
19	3
20	2
21	3
22	3
23	4
24	2
25	4
26	3
27	3
28	2
29	4
30	3
31	4
32	3
33	2
34	3
35	4
36	4
37	4
38	2
39	4
40	3
41	3
42	3
43	4
44	3
45	4
46	4
47	4
48	3
49	4
50	2
51	4
52	3
53	4
54	2
55	4
56	4
57	3
58	4
59	3
60	3
61	5
62	2
63	4
64	4
65	3
66	3
67	5
68	3
69	3
70	3
71	4
72	3
73	3
74	4
75	3
76	3
77	3
78	3
79	5
80	2

n	a(n)
1	0
2	1
3	2
4	2
5	2
6	2
7	3
8	2
9	3
10	2
11	4
12	2
13	3
14	2
15	3
16	4
17	2
18	2
19	3
20	2
21	3
22	3
23	4
24	2
25	4
26	3
27	3
28	2
29	4
30	3
31	4
32	3
33	2
34	3
35	4
36	4
37	4
38	2
39	4
40	3
41	3
42	3
43	4
44	3
45	4
46	4
47	4
48	3
49	4
50	2
51	4
52	3
53	4
54	2
55	4
56	4
57	3
58	4
59	3
60	3
61	5
62	2
63	4
64	4
65	3
66	3
67	5
68	3
69	3
70	3
71	4
72	3
73	3
74	4
75	3
76	3
77	3
78	3
79	5
80	2

n	a(n)
1	0
2	1
3	2
4	2
5	2
6	2
7	3
8	2
9	3
10	2
11	4
12	2
13	3
14	2
15	3
16	4
17	2
18	2
19	3
20	2
21	3
22	3
23	4
24	2
25	4
26	3
27	3
28	2
29	4
30	3
31	4
32	3
33	2
34	3
35	4
36	4
37	4
38	2
39	4
40	3
41	3
42	3
43	4
44	3
45	4
46	4
47	4
48	3
49	4
50	2
51	4
52	3
53	4
54	2
55	4
56	4
57	3
58	4
59	3
60	3
61	5
62	2
63	4
64	4
65	3
66	3
67	5
68	3
69	3
70	3
71	4
72	3
73	3
74	4
75	3
76	3
77	3
78	3
79	5
80	2