A293620 - cp's OEIS frontend

A293620 Numbers k such that f(k), f(k+1) and f(k+2) are all primes, where f(k) = (2k+1)^2 - 2 (A073577).

n	a(n)
1	1
2	2
3	16
4	58
5	149
6	177
7	534
8	681
9	954
10	1045
11	1052
12	1255
13	1367
14	1563
15	2046
16	2074
17	2515
18	2557
19	2564
20	2788
21	3586
22	3593
23	3908
24	4062
25	4552
26	5252
27	5371
28	5385
29	6400
30	6729
31	7443
32	7478
33	9305
34	9375
35	9942
36	10355
37	10411
38	10726
39	10740
40	11286
41	11545
42	11559
43	11832
44	11965

[1, 2, 16, 58, 149, 177, 534, 681, 954, 1045, 1052, 1255, 1367, 1563, 2046, 2074, 2515, 2557, 2564, 2788, 3586, 3593, 3908, 4062, 4552, 5252, 5371, 5385, 6400, 6729, 7443, 7478, 9305, 9375, 9942, 10355, 10411, 10726, 10740, 11286, 11545, 11559, 11832, 11965]

cp's OEIS Frontend

A293620 Numbers k such that f(k), f(k+1) and f(k+2) are all primes, where f(k) = (2k+1)^2 - 2 (A073577).

Table of values

List of values