A193330 - cp's OEIS frontend

A193330 Number of prime factors of n^2 + 1, counted with multiplicity.

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

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

cp's OEIS Frontend

A193330 Number of prime factors of n^2 + 1, counted with multiplicity.

Table of values

List of values

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

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

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