A059761 - cp's OEIS frontend

A059761 Initial primes of Cunningham chains of first type with length exactly 2. Primes in A059453 that survive as primes only one "2p-1 iteration", forming chains of exactly 2 terms.

n	a(n)
1	3
2	29
3	53
4	113
5	131
6	173
7	191
8	233
9	239
10	251
11	281
12	293
13	419
14	431
15	443
16	491
17	593
18	641
19	653
20	659
21	683
22	743
23	761
24	809
25	911
26	953
27	1013
28	1049
29	1103
30	1223
31	1289
32	1499
33	1559
34	1583
35	1601
36	1733
37	1973
38	2003
39	2069
40	2129
41	2141
42	2273
43	2339
44	2351
45	2393
46	2399
47	2543

[3, 29, 53, 113, 131, 173, 191, 233, 239, 251, 281, 293, 419, 431, 443, 491, 593, 641, 653, 659, 683, 743, 761, 809, 911, 953, 1013, 1049, 1103, 1223, 1289, 1499, 1559, 1583, 1601, 1733, 1973, 2003, 2069, 2129, 2141, 2273, 2339, 2351, 2393, 2399, 2543]

cp's OEIS Frontend

A059761 Initial primes of Cunningham chains of first type with length exactly 2. Primes in A059453 that survive as primes only one "2p-1 iteration", forming chains of exactly 2 terms.

Table of values

List of values