A103804 - cp's OEIS frontend

A103804 Primes p such that both 2p +/- 21 are primes.

n	a(n)
1	13
2	19
3	29
4	31
5	41
6	59
7	79
8	89
9	101
10	109
11	131
12	179
13	211
14	239
15	241
16	271
17	311
18	331
19	349
20	409
21	421
22	449
23	499
24	509
25	521
26	541
27	601
28	619
29	701
30	751
31	821
32	839
33	881
34	1009
35	1091
36	1181
37	1201
38	1319
39	1321
40	1399
41	1429
42	1459
43	1489
44	1531
45	1571
46	1619
47	1801
48	1949
49	1951

[13, 19, 29, 31, 41, 59, 79, 89, 101, 109, 131, 179, 211, 239, 241, 271, 311, 331, 349, 409, 421, 449, 499, 509, 521, 541, 601, 619, 701, 751, 821, 839, 881, 1009, 1091, 1181, 1201, 1319, 1321, 1399, 1429, 1459, 1489, 1531, 1571, 1619, 1801, 1949, 1951]

cp's OEIS Frontend

A103804 Primes p such that both 2p +/- 21 are primes.

Table of values

List of values