Smallest nontrivial extension of n^2 which is a square.

Terms

a(0) =16a(1) =49a(2) =900a(3) =169a(4) =256a(5) =361a(6) =4900a(7) =6400a(8) =8100a(9) =10000a(10) =12100a(11) =1444a(12) =16900a(13) =19600a(14) =22500a(15) =25600a(16) =28900a(17) =3249a(18) =36100a(19) =40000a(20) =44100a(21) =48400a(22) =52900a(23) =57600a(24) =62500a(25) =67600a(26) =72900a(27) =78400a(28) =84100a(29) =90000