A089120 - cp's OEIS frontend

A089120 Smallest prime factor of n^2 + 1.

n	a(n)
1	2
2	5
3	2
4	17
5	2
6	37
7	2
8	5
9	2
10	101
11	2
12	5
13	2
14	197
15	2
16	257
17	2
18	5
19	2
20	401
21	2
22	5
23	2
24	577
25	2
26	677
27	2
28	5
29	2
30	17
31	2
32	5
33	2
34	13
35	2
36	1297
37	2
38	5
39	2
40	1601
41	2
42	5
43	2
44	13
45	2
46	29
47	2
48	5
49	2
50	41
51	2
52	5
53	2
54	2917
55	2
56	3137
57	2
58	5
59	2
60	13
61	2
62	5
63	2
64	17
65	2
66	4357
67	2
68	5
69	2
70	13
71	2
72	5
73	2
74	5477
75	2
76	53
77	2
78	5
79	2
80	37
81	2
82	5
83	2

[2, 5, 2, 17, 2, 37, 2, 5, 2, 101, 2, 5, 2, 197, 2, 257, 2, 5, 2, 401, 2, 5, 2, 577, 2, 677, 2, 5, 2, 17, 2, 5, 2, 13, 2, 1297, 2, 5, 2, 1601, 2, 5, 2, 13, 2, 29, 2, 5, 2, 41, 2, 5, 2, 2917, 2, 3137, 2, 5, 2, 13, 2, 5, 2, 17, 2, 4357, 2, 5, 2, 13, 2, 5, 2, 5477, 2, 53, 2, 5, 2, 37, 2, 5, 2]

cp's OEIS Frontend

A089120 Smallest prime factor of n^2 + 1.

Table of values

List of values