A057934 - cp's OEIS frontend

A057934 Number of prime factors of 10^n + 1 (counted with multiplicity).

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

[1, 1, 3, 2, 2, 2, 2, 2, 5, 3, 5, 3, 3, 4, 7, 5, 4, 3, 2, 4, 8, 4, 5, 3, 5, 3, 7, 4, 3, 7, 2, 4, 9, 4, 5, 6, 4, 3, 10, 4, 3, 7, 4, 4, 12, 4, 4, 9, 4, 7, 8, 4, 2, 6, 10, 5, 6, 5, 4, 6, 3, 3, 12, 3, 6, 8, 2, 4, 10, 11, 3, 5, 4, 7, 11, 6, 12, 7, 4, 9, 11, 3, 7, 8, 8, 3, 8, 4, 4, 11, 6, 4, 8, 4, 6, 8, 4, 5, 13]

cp's OEIS Frontend

A057934 Number of prime factors of 10^n + 1 (counted with multiplicity).

Table of values

List of values

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

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

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