Squares with digital root 4.

Terms

a(0) =4a(1) =49a(2) =121a(3) =256a(4) =400a(5) =625a(6) =841a(7) =1156a(8) =1444a(9) =1849a(10) =2209a(11) =2704a(12) =3136a(13) =3721a(14) =4225a(15) =4900a(16) =5476a(17) =6241a(18) =6889a(19) =7744a(20) =8464a(21) =9409a(22) =10201a(23) =11236a(24) =12100a(25) =13225a(26) =14161a(27) =15376a(28) =16384a(29) =17689