54918domain: NAppears in sequencesNumbers k such that k^2 contains every digit at least once.at n=24A054038Numbers n such that n^2 contains every decimal digit exactly once.at n=24A156977Expansion of e.g.f. 1/(1 - x * (exp(3*x) - 1)).at n=6A367886Number of subsets of {1..n} where no two elements sum to a prime.at n=29A391562