A222563 - cp's OEIS frontend

A222563 Primes p such that the sum of divisors (excluding 1 and p - 1) of p - 1 and the sum of divisors (excluding 1 and p + 1) of p + 1 are both prime.

n	a(n)
1	5
2	59
3	83
4	239
5	281
6	359
7	443
8	479
9	521
10	599
11	761
12	839
13	1163
14	1319
15	1361
16	1583
17	1619
18	1721
19	1787
20	1871
21	1877
22	2003
23	2063
24	2339
25	2927
26	2969
27	3251
28	3371
29	3407
30	3671
31	3767
32	3917
33	4001
34	4013
35	4229
36	4283
37	4397
38	4451
39	4463
40	4649
41	4679
42	5147
43	5261
44	6287
45	6329
46	6659
47	6689

[5, 59, 83, 239, 281, 359, 443, 479, 521, 599, 761, 839, 1163, 1319, 1361, 1583, 1619, 1721, 1787, 1871, 1877, 2003, 2063, 2339, 2927, 2969, 3251, 3371, 3407, 3671, 3767, 3917, 4001, 4013, 4229, 4283, 4397, 4451, 4463, 4649, 4679, 5147, 5261, 6287, 6329, 6659, 6689]

cp's OEIS Frontend

A222563 Primes p such that the sum of divisors (excluding 1 and p - 1) of p - 1 and the sum of divisors (excluding 1 and p + 1) of p + 1 are both prime.

Table of values

List of values