%N Squares for which both the sum of the digits and the product of the digits are cubes.
%e 321489 is in the sequence because it is a square and (1)the sum of its digits 3+2+1+4+8+9=27 is a cube and (2)the product of its digits 3*2*1*4*8*9=1728 is also a cube.
%Y Cf. A000290, A000578.
%A Luc Stevens (lms022(AT)yahoo.com), Apr 12 2006