A229095 - cp's OEIS frontend

A229095 Numbers k such that Sum_{i=1..k} i^tau(i) == 0 (mod k), where tau(i) = A000005(i), the number of divisors of i.

n	a(n)
1	1
2	8
3	9
4	67
5	72
6	467
7	801
8	1071
9	5141
10	7193
11	25688
12	68488
13	97768
14	111816
15	381061
16	7829505
17	17079937
18	25615576
19	44582211
20	91110856
21	639359784
22	3492789629

[1, 8, 9, 67, 72, 467, 801, 1071, 5141, 7193, 25688, 68488, 97768, 111816, 381061, 7829505, 17079937, 25615576, 44582211, 91110856, 639359784, 3492789629]

cp's OEIS Frontend

A229095 Numbers k such that Sum_{i=1..k} i^tau(i) == 0 (mod k), where tau(i) = A000005(i), the number of divisors of i.

Table of values

List of values