A247175 - cp's OEIS frontend

A247175 Numbers n such that 2(n^2 + 2) - 1 and 2(n^2 + 2) + 1 are both prime.

n	a(n)
1	0
2	1
3	2
4	7
5	23
6	47
7	98
8	208
9	268
10	278
11	352
12	422
13	712
14	803
15	833
16	887
17	1022
18	1048
19	1052
20	1057
21	1297
22	1372
23	1517
24	1603
25	1657
26	1717
27	1748
28	1888
29	1988
30	2102
31	2207
32	2233
33	2357
34	2548
35	2567
36	2753
37	2828
38	2893
39	2938
40	3017
41	3362
42	3367
43	3572
44	3817
45	3908
46	4247
47	4268
48	4312
49	4403
50	4408
51	4412
52	4478

[0, 1, 2, 7, 23, 47, 98, 208, 268, 278, 352, 422, 712, 803, 833, 887, 1022, 1048, 1052, 1057, 1297, 1372, 1517, 1603, 1657, 1717, 1748, 1888, 1988, 2102, 2207, 2233, 2357, 2548, 2567, 2753, 2828, 2893, 2938, 3017, 3362, 3367, 3572, 3817, 3908, 4247, 4268, 4312, 4403, 4408, 4412, 4478]

cp's OEIS Frontend

A247175 Numbers n such that 2(n^2 + 2) - 1 and 2(n^2 + 2) + 1 are both prime.

Table of values

List of values

cp's OEIS Frontend

A247175 Numbers n such that 2*(n^2 + 2) - 1 and 2*(n^2 + 2) + 1 are both prime.

Table of values

List of values

A247175 Numbers n such that 2(n^2 + 2) - 1 and 2(n^2 + 2) + 1 are both prime.