Squares whose sum of digits as well as product of digits is a square (allowing zero).

Terms

a(0) =0a(1) =1a(2) =4a(3) =9a(4) =100a(5) =144a(6) =400a(7) =441a(8) =900a(9) =2025a(10) =2304a(11) =2601a(12) =3600a(13) =8100a(14) =9025a(15) =10000a(16) =10201a(17) =10404a(18) =10609a(19) =10816a(20) =11025a(21) =12100a(22) =14400a(23) =14884a(24) =16900a(25) =19600a(26) =21904a(27) =22500a(28) =30625a(29) =30976