Squares using no more than two distinct digits.

Terms

a(0) =0a(1) =1a(2) =4a(3) =9a(4) =16a(5) =25a(6) =36a(7) =49a(8) =64a(9) =81a(10) =100a(11) =121a(12) =144a(13) =225a(14) =400a(15) =441a(16) =484a(17) =676a(18) =900a(19) =1444a(20) =7744a(21) =10000a(22) =11881a(23) =29929a(24) =40000a(25) =44944a(26) =55225a(27) =69696a(28) =90000a(29) =1000000