A057207 - cp's OEIS frontend

A057207 a(1)=5, a(n) is the smallest prime dividing 4*Q^2 + 1 where Q is the product of all previous terms in the sequence.

n	a(n)
1	5
2	101
3	1020101
4	53
5	29
6	2507707213238852620996901
7	449
8	13
9	8693
10	1997
11	6029
12	61
13	3181837
14	113
15	181
16	1934689
17	6143090225314378441493352126119201470973493456817556328833988172277
18	4733
19	3617
20	41
21	68141
22	37
23	51473
24	17
25	821
26	598201519454797
27	157
28	9689
29	2357
30	757
31	149
32	293
33	5261

[5, 101, 1020101, 53, 29, 2507707213238852620996901, 449, 13, 8693, 1997, 6029, 61, 3181837, 113, 181, 1934689, 6143090225314378441493352126119201470973493456817556328833988172277, 4733, 3617, 41, 68141, 37, 51473, 17, 821, 598201519454797, 157, 9689, 2357, 757, 149, 293, 5261]

cp's OEIS Frontend

A057207 a(1)=5, a(n) is the smallest prime dividing 4*Q^2 + 1 where Q is the product of all previous terms in the sequence.

Table of values

List of values