Squares whose sum of digits as well as product of digits is a nonzero square.

Terms

a(0) =1a(1) =4a(2) =9a(3) =144a(4) =441a(5) =14884a(6) =44944a(7) =48841a(8) =132496a(9) =214369a(10) =268324a(11) =288369a(12) =294849a(13) =346921a(14) =436921a(15) =511225a(16) =617796a(17) =938961a(18) =1234321a(19) =1336336a(20) =1833316a(21) =2325625a(22) =2356225a(23) =2585664a(24) =2614689a(25) =2778889a(26) =2862864a(27) =3323329a(28) =3767481a(29) =4691556