839927domain: NAppears in sequencesNumbers that are the sum of 2 positive 7th powers.at n=24A003369Numbers that are the sum of at most 2 positive 7th powers.at n=32A004864a(n) = 4^n + 7^n.at n=7A074613Numbers that can be represented as a^7 + b^7, with 0 < a < b, in exactly one way.at n=18A088719