a(n) is the smallest number which can be represented as the sum of 7 distinct positive n-th powers in exactly 4 ways, or -1 if no such number exists.

A375334

a(n) is the smallest number which can be represented as the sum of 7 distinct positive n-th powers in exactly 4 ways, or -1 if no such number exists.

Terms

    a(0) =-1a(1) =268a(2) =2835a(3) =49316a(4) =20301007a(5) =349717731

External references