A070155 - cp's OEIS frontend

A070155 Numbers k such that k-1, k+1 and k^2+1 are prime numbers.

n	a(n)
1	4
2	6
3	150
4	180
5	240
6	270
7	420
8	570
9	1290
10	1320
11	2310
12	2550
13	2730
14	3360
15	3390
16	4260
17	4650
18	5850
19	5880
20	6360
21	6780
22	9000
23	9240
24	9630
25	10530
26	10890
27	11970
28	13680
29	13830
30	14010
31	14550
32	16230
33	16650
34	18060
35	18120
36	18540
37	19140
38	19380
39	21600
40	21840

[4, 6, 150, 180, 240, 270, 420, 570, 1290, 1320, 2310, 2550, 2730, 3360, 3390, 4260, 4650, 5850, 5880, 6360, 6780, 9000, 9240, 9630, 10530, 10890, 11970, 13680, 13830, 14010, 14550, 16230, 16650, 18060, 18120, 18540, 19140, 19380, 21600, 21840]

cp's OEIS Frontend

A070155 Numbers k such that k-1, k+1 and k^2+1 are prime numbers.

Table of values

List of values