78254domain: NAppears in sequencesNumbers that are the sum of 3 positive 7th powers.at n=21A003370Numbers that are the sum of at most 3 positive 7th powers.at n=39A004865a(n) = 1^n + 2^n + 5^n.at n=7A074501[(1+e^n)/(1+e*n)], where [ ]=floor.at n=14A191693