A271442 - cp's OEIS frontend

A271442 a(n) is the smallest k such that sigma(2,x) = k has exactly n solutions, where sigma(2,x) is the sum of the squares of the divisors of x.

n	a(n)
0	2
1	1
2	50
3	22100
4	6409000
5	32045000
6	1185665000
7	11856650000
8	628402450000
9	1169065690000
10	16338463700000
11	81692318500000
12	875993015300000
13	1388769414500000
14	8054862604100000
15	88701519427300000
16	443507597136500000
17	80548626041000000

[2, 1, 50, 22100, 6409000, 32045000, 1185665000, 11856650000, 628402450000, 1169065690000, 16338463700000, 81692318500000, 875993015300000, 1388769414500000, 8054862604100000, 88701519427300000, 443507597136500000, 80548626041000000]

cp's OEIS Frontend

A271442 a(n) is the smallest k such that sigma(2,x) = k has exactly n solutions, where sigma(2,x) is the sum of the squares of the divisors of x.

Table of values

List of values