A290841 - cp's OEIS frontend

A290841 a(n) is the least number k such that the sum of the n-th powers of the proper divisors of k is a prime number.

n	a(n)
1	4
2	4
3	8
4	4
5	115
6	33
7	119
8	4
9	8
10	18
11	35
12	15
13	21
14	177
15	565
16	4
17	21
18	501
19	155
20	275
21	175
22	72
23	63
24	21
25	161
26	207
27	50
28	100
29	415
30	393
31	493
32	453
33	1250
34	33
35	75
36	15
37	85
38	777
39	655
40	351
41	649
42	833
43	327
44	219
45	1727
46	123
47	57
48	15
49	21
50	357
51	183
52	1113
53	50
54	87
55	57
56	135
57	831
58	291
59	341
60	196
61	175
62	249
63	2107
64	783
65	57
66	927
67	800
68	39
69	209

[4, 4, 8, 4, 115, 33, 119, 4, 8, 18, 35, 15, 21, 177, 565, 4, 21, 501, 155, 275, 175, 72, 63, 21, 161, 207, 50, 100, 415, 393, 493, 453, 1250, 33, 75, 15, 85, 777, 655, 351, 649, 833, 327, 219, 1727, 123, 57, 15, 21, 357, 183, 1113, 50, 87, 57, 135, 831, 291, 341, 196, 175, 249, 2107, 783, 57, 927, 800, 39, 209]

cp's OEIS Frontend

A290841 a(n) is the least number k such that the sum of the n-th powers of the proper divisors of k is a prime number.

Table of values

List of values