A299959 - cp's OEIS frontend

A299959 Least prime factor of (4^(2n+1)+1)/5, a(0) = 1.

n	a(n)
0	1
1	13
2	5
3	29
4	13
5	397
6	53
7	5
8	137
9	229
10	13
11	277
12	5
13	13
14	107367629
15	5581
16	13
17	5
18	149
19	13
20	10169
21	173
22	5
23	3761
24	29
25	13
26	15358129
27	5
28	13
29	1181
30	733
31	13
32	5
33	269
34	13
35	569
36	293
37	5
38	29
39	317
40	13
41	997
42	5
43	13
44	1069
45	29
46	13
47	5
48	389
49	13
50	809
51	41201
52	5
53	857
54	5669
55	13
56	58309
57	5
58	13
59	29
60	397
61	13
62	5
63	509
64	13

[1, 13, 5, 29, 13, 397, 53, 5, 137, 229, 13, 277, 5, 13, 107367629, 5581, 13, 5, 149, 13, 10169, 173, 5, 3761, 29, 13, 15358129, 5, 13, 1181, 733, 13, 5, 269, 13, 569, 293, 5, 29, 317, 13, 997, 5, 13, 1069, 29, 13, 5, 389, 13, 809, 41201, 5, 857, 5669, 13, 58309, 5, 13, 29, 397, 13, 5, 509, 13]

cp's OEIS Frontend

A299959 Least prime factor of (4^(2n+1)+1)/5, a(0) = 1.

Table of values

List of values