A215533 - cp's OEIS frontend

A215533 Numbers n such that n^s(n) + 1 is a prime, where s(n) is the sum of the digits of n.

n	a(n)
1	1
2	2
3	4
4	10
5	20
6	100
7	110
8	152
9	220
10	242
11	736
12	790
13	800
14	916
15	1010
16	1078
17	1106
18	1232
19	1528
20	1636
21	1834
22	2284
23	2330
24	2392
25	2600
26	3100
27	3562
28	3904
29	4000
30	4066
31	4228
32	4444
33	4552
34	5056
35	6082
36	6208
37	6226
38	7810
39	8170
40	8530
41	9520

[1, 2, 4, 10, 20, 100, 110, 152, 220, 242, 736, 790, 800, 916, 1010, 1078, 1106, 1232, 1528, 1636, 1834, 2284, 2330, 2392, 2600, 3100, 3562, 3904, 4000, 4066, 4228, 4444, 4552, 5056, 6082, 6208, 6226, 7810, 8170, 8530, 9520]

cp's OEIS Frontend

A215533 Numbers n such that n^s(n) + 1 is a prime, where s(n) is the sum of the digits of n.

Table of values

List of values