A246857 - cp's OEIS frontend

A246857 Numbers k such that sigma(k + sigma(k)) = 2*sigma(k).

n	a(n)
1	2
2	3
3	5
4	11
5	23
6	29
7	41
8	53
9	83
10	89
11	113
12	131
13	173
14	179
15	191
16	233
17	239
18	251
19	281
20	293
21	329
22	359
23	413
24	419
25	431
26	443
27	491
28	509
29	593
30	623
31	641
32	653
33	659
34	683
35	719
36	743
37	761
38	809
39	869
40	911
41	953
42	979
43	1013
44	1019
45	1031
46	1049
47	1103
48	1223
49	1229
50	1289
51	1409
52	1439
53	1451

[2, 3, 5, 11, 23, 29, 41, 53, 83, 89, 113, 131, 173, 179, 191, 233, 239, 251, 281, 293, 329, 359, 413, 419, 431, 443, 491, 509, 593, 623, 641, 653, 659, 683, 719, 743, 761, 809, 869, 911, 953, 979, 1013, 1019, 1031, 1049, 1103, 1223, 1229, 1289, 1409, 1439, 1451]

cp's OEIS Frontend

A246857 Numbers k such that sigma(k + sigma(k)) = 2*sigma(k).

Table of values

List of values