A216898 - cp's OEIS frontend

A216898 a(n) = smallest number k such that both k - n^2 and k + n^2 are primes.

n	a(n)
0	2
1	4
2	7
3	14
4	21
5	28
6	43
7	52
8	67
9	86
10	111
11	150
12	149
13	180
14	201
15	232
16	267
17	312
18	329
19	366
20	411
21	446
22	487
23	532
24	587
25	654
26	705
27	742
28	787
29	852
30	911
31	972
32	1029
33	1118
34	1185
35	1242
36	1313
37	1372
38	1473
39	1528
40	1603
41	1692
42	1769
43	1852
44	1941
45	2032
46	2127
47	2212
48	2317
49	2412
50	2503

[2, 4, 7, 14, 21, 28, 43, 52, 67, 86, 111, 150, 149, 180, 201, 232, 267, 312, 329, 366, 411, 446, 487, 532, 587, 654, 705, 742, 787, 852, 911, 972, 1029, 1118, 1185, 1242, 1313, 1372, 1473, 1528, 1603, 1692, 1769, 1852, 1941, 2032, 2127, 2212, 2317, 2412, 2503]

cp's OEIS Frontend

A216898 a(n) = smallest number k such that both k - n^2 and k + n^2 are primes.

Table of values

List of values