A239326 - cp's OEIS frontend

A239326 Numbers k such that k^2 +/- (k-1) and (k-1)*k^2 +/- 1 are all primes.

n	a(n)
1	2
2	3
3	6
4	13
5	21
6	100
7	120
8	195
9	393
10	541
11	1749
12	1849
13	3640
14	3829
15	4003
16	5488
17	5754
18	8973
19	8989
20	9043
21	10824
22	10828
23	13488
24	17016
25	18493
26	19306
27	21505
28	24270
29	27139
30	30163
31	31530
32	34134
33	35034
34	39514
35	40761
36	46215
37	46285
38	46398
39	49071
40	49869
41	53319
42	55320

[2, 3, 6, 13, 21, 100, 120, 195, 393, 541, 1749, 1849, 3640, 3829, 4003, 5488, 5754, 8973, 8989, 9043, 10824, 10828, 13488, 17016, 18493, 19306, 21505, 24270, 27139, 30163, 31530, 34134, 35034, 39514, 40761, 46215, 46285, 46398, 49071, 49869, 53319, 55320]

cp's OEIS Frontend

A239326 Numbers k such that k^2 +/- (k-1) and (k-1)*k^2 +/- 1 are all primes.

Table of values

List of values