74833domain: NAppears in sequencesSmallest number whose square has sum of digits A056991(n).at n=33A067179Square roots of A068809.at n=25A068947Expansion of Product_{k>=1} (1 - (x*(1 + x))^k).at n=28A309575Smallest k such that the sum of digits of k^2 in base 10 is divisible by n.at n=37A389004