419017

Appears in sequences

• Numbers n such that (j^k + k^j) == 0 (mod k+j), j=4 case.at n=34A114979
• Numerator of 1/n^2 + 2/(n-1)^2 + 3/(n-2)^2 +...+ (n-1)/2^2 + n.at n=6A120286