a(n) is the smallest number which can be represented as the sum of 4 distinct positive n-th powers in exactly 2 ways, or -1 if no such number exists.

A374424

a(n) is the smallest number which can be represented as the sum of 4 distinct positive n-th powers in exactly 2 ways, or -1 if no such number exists.

Terms

    a(0) =12a(1) =90a(2) =1036a(3) =6834a(4) =4062500a(5) =160426515

External references