A228434 - cp's OEIS frontend

A228434 Primes expressible as sigma(n) + sigma(sigma(n)), in order of their occurrence.

n	a(n)
1	2
2	7
3	11
4	23
5	127
6	167
7	137
8	269
9	547
10	547
11	383
12	547
13	269
14	431
15	547
16	547
17	293
18	383
19	431
20	1171
21	1039
22	1171
23	641
24	1039
25	1103
26	1171
27	887
28	1361
29	2551
30	1861
31	3001
32	2753
33	1193
34	2963
35	1499
36	2153
37	2753
38	2551
39	2963
40	4327
41	5281
42	1823
43	2963
44	4219
45	4327
46	3593
47	3583
48	6763

[2, 7, 11, 23, 127, 167, 137, 269, 547, 547, 383, 547, 269, 431, 547, 547, 293, 383, 431, 1171, 1039, 1171, 641, 1039, 1103, 1171, 887, 1361, 2551, 1861, 3001, 2753, 1193, 2963, 1499, 2153, 2753, 2551, 2963, 4327, 5281, 1823, 2963, 4219, 4327, 3593, 3583, 6763]

cp's OEIS Frontend

A228434 Primes expressible as sigma(n) + sigma(sigma(n)), in order of their occurrence.

Table of values

List of values