A080748 - cp's OEIS frontend

A080748 Number of distinct prime factors of n-th Fermat pseudoprime to base 2.

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

[2, 3, 3, 3, 2, 3, 3, 2, 3, 2, 3, 2, 2, 2, 3, 2, 2, 3, 2, 2, 3, 3, 2, 3, 4, 3, 3, 2, 3, 2, 2, 3, 3, 4, 2, 2, 4, 2, 3, 3, 3, 3, 2, 2, 2, 3, 3, 2, 4, 4, 3, 2, 3, 2, 2, 3, 4, 3, 2, 2, 4, 4, 2, 2, 3, 4, 3, 4, 2, 2, 3, 2, 3, 2, 3, 2, 3, 3]

cp's OEIS Frontend

A080748 Number of distinct prime factors of n-th Fermat pseudoprime to base 2.

Table of values

List of values

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

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

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