A280187 - cp's OEIS frontend

A280187 Numbers n such that 2 * (1^n + 2^n + 3^n + ... + n^n) is not 0 (mod n), but 2 * (1^d + 2^d + 3^d + ... + d^d) is 0 (mod d) for each other d | n.

n	a(n)
1	6
2	20
3	110
4	272
5	506
6	812
7	2162
8	2756
9	3422
10	4970
11	6806
12	7832
13	11342
14	12656
15	17030
16	18632
17	22052
18	27722
19	29756
20	31862
21	36290
22	38612
23	51302
24	54056
25	56882
26	62750
27	65792
28	68906
29	72092
30	85556
31	96410
32	100172
33	120062
34	124256
35	128522

[6, 20, 110, 272, 506, 812, 2162, 2756, 3422, 4970, 6806, 7832, 11342, 12656, 17030, 18632, 22052, 27722, 29756, 31862, 36290, 38612, 51302, 54056, 56882, 62750, 65792, 68906, 72092, 85556, 96410, 100172, 120062, 124256, 128522]

cp's OEIS Frontend

A280187 Numbers n such that 2 * (1^n + 2^n + 3^n + ... + n^n) is not 0 (mod n), but 2 * (1^d + 2^d + 3^d + ... + d^d) is 0 (mod d) for each other d | n.

Table of values

List of values