A357218 - cp's OEIS frontend

A357218 Primes p such that T(p) - 2 is prime, where T(p) is the triangular number (A000217) with index p.

n	a(n)
1	5
2	13
3	17
4	29
5	37
6	41
7	53
8	61
9	73
10	89
11	97
12	149
13	157
14	193
15	197
16	233
17	257
18	269
19	277
20	281
21	313
22	337
23	389
24	401
25	409
26	457
27	509
28	521
29	541
30	613
31	641
32	673
33	701
34	797
35	857
36	877
37	881
38	929
39	953
40	997
41	1009
42	1033
43	1093
44	1109
45	1117
46	1129
47	1153
48	1193
49	1297
50	1301
51	1373
52	1381
53	1433
54	1481
55	1493

[5, 13, 17, 29, 37, 41, 53, 61, 73, 89, 97, 149, 157, 193, 197, 233, 257, 269, 277, 281, 313, 337, 389, 401, 409, 457, 509, 521, 541, 613, 641, 673, 701, 797, 857, 877, 881, 929, 953, 997, 1009, 1033, 1093, 1109, 1117, 1129, 1153, 1193, 1297, 1301, 1373, 1381, 1433, 1481, 1493]

cp's OEIS Frontend

A357218 Primes p such that T(p) - 2 is prime, where T(p) is the triangular number (A000217) with index p.

Table of values

List of values