53787domain: NAppears in sequencesa(n+1) is the smallest number > a(n) such that the digits of a(n)^2 are all (with multiplicity) contained in the digits of a(n+1)^2, with a(0)=2.at n=18A067975a(n) = Sum_{k=1..n} mu(k)*k^3.at n=34A336277a(n) = Sum_{k=1..n} mu(k)*k^3.at n=35A336277