A002643 - cp's OEIS frontend

A002643 Numbers k such that (k^2 + k + 1)/19 is prime.

n	a(n)
1	7
2	11
3	26
4	45
5	83
6	125
7	140
8	182
9	197
10	201
11	216
12	239
13	258
14	311
15	330
16	353
17	444
18	467
19	482
20	486
21	524
22	539
23	558
24	600
25	752
26	771
27	843
28	881
29	885
30	923
31	980
32	999
33	1071
34	1113
35	1170
36	1223
37	1337
38	1356
39	1470
40	1664
41	1835
42	1869
43	1911
44	1949
45	1968
46	2021
47	2078
48	2120
49	2192

[7, 11, 26, 45, 83, 125, 140, 182, 197, 201, 216, 239, 258, 311, 330, 353, 444, 467, 482, 486, 524, 539, 558, 600, 752, 771, 843, 881, 885, 923, 980, 999, 1071, 1113, 1170, 1223, 1337, 1356, 1470, 1664, 1835, 1869, 1911, 1949, 1968, 2021, 2078, 2120, 2192]

cp's OEIS Frontend

A002643 Numbers k such that (k^2 + k + 1)/19 is prime.

Table of values

List of values