A070689 - cp's OEIS frontend

A070689 Numbers k such that k+1 and k^2+1 are primes.

n	a(n)
1	1
2	2
3	4
4	6
5	10
6	16
7	36
8	40
9	66
10	126
11	130
12	150
13	156
14	180
15	210
16	240
17	250
18	256
19	270
20	280
21	306
22	396
23	400
24	420
25	430
26	466
27	490
28	556
29	570
30	576
31	646
32	690
33	700
34	750
35	760
36	826
37	906
38	910
39	936
40	946
41	966
42	1060
43	1096
44	1150
45	1276
46	1290
47	1306
48	1320
49	1366
50	1566
51	1570

[1, 2, 4, 6, 10, 16, 36, 40, 66, 126, 130, 150, 156, 180, 210, 240, 250, 256, 270, 280, 306, 396, 400, 420, 430, 466, 490, 556, 570, 576, 646, 690, 700, 750, 760, 826, 906, 910, 936, 946, 966, 1060, 1096, 1150, 1276, 1290, 1306, 1320, 1366, 1566, 1570]

cp's OEIS Frontend

A070689 Numbers k such that k+1 and k^2+1 are primes.

Table of values

List of values