A002644 - cp's OEIS frontend

A002644 Numbers k such that (k^2 + k + 1)/21 is prime.

n	a(n)
1	16
2	25
3	37
4	46
5	58
6	88
7	109
8	130
9	142
10	151
11	184
12	193
13	205
14	247
15	268
16	298
17	310
18	319
19	331
20	340
21	382
22	394
23	403
24	415
25	424
26	457
27	478
28	487
29	541
30	550
31	604
32	613
33	688
34	697
35	709
36	730
37	739
38	751
39	760
40	793
41	844
42	865
43	886
44	907
45	970
46	1012
47	1045
48	1054
49	1066
50	1117
51	1138

[16, 25, 37, 46, 58, 88, 109, 130, 142, 151, 184, 193, 205, 247, 268, 298, 310, 319, 331, 340, 382, 394, 403, 415, 424, 457, 478, 487, 541, 550, 604, 613, 688, 697, 709, 730, 739, 751, 760, 793, 844, 865, 886, 907, 970, 1012, 1045, 1054, 1066, 1117, 1138]

cp's OEIS Frontend

A002644 Numbers k such that (k^2 + k + 1)/21 is prime.

Table of values

List of values