68313domain: NAppears in sequencesa(n)^2 is the smallest square containing exactly n 6's.at n=5A0483516th column of A145142.at n=4A145148a(n) = smallest number m such that m^2 has exactly n decimal digits n.at n=6A179895Numbers k that divide the k-th little Schroeder number.at n=26A372903