A145688 - cp's OEIS frontend

A145688 Primitive prime factors of the sequence 2k^2 + 1 in the order that they are found.

n	a(n)
1	3
2	19
3	11
4	17
5	73
6	43
7	163
8	67
9	113
10	131
11	41
12	193
13	59
14	241
15	89
16	883
17	353
18	1153
19	139
20	1459
21	523
22	1801
23	641
24	683
25	2179
26	257
27	2593
28	83
29	107
30	179
31	97
32	3529
33	137
34	1291
35	4051
36	491
37	419
38	1601
39	1667
40	601
41	1873
42	307
43	2017
44	2243
45	211
46	379
47	827
48	233
49	467
50	2731
51	313
52	8713

[3, 19, 11, 17, 73, 43, 163, 67, 113, 131, 41, 193, 59, 241, 89, 883, 353, 1153, 139, 1459, 523, 1801, 641, 683, 2179, 257, 2593, 83, 107, 179, 97, 3529, 137, 1291, 4051, 491, 419, 1601, 1667, 601, 1873, 307, 2017, 2243, 211, 379, 827, 233, 467, 2731, 313, 8713]

cp's OEIS Frontend

A145688 Primitive prime factors of the sequence 2k^2 + 1 in the order that they are found.

Table of values

List of values