Squares that remain a square if a suitably chosen digit is dropped.

Terms

a(0) =1a(1) =4a(2) =9a(3) =16a(4) =49a(5) =64a(6) =81a(7) =100a(8) =169a(9) =196a(10) =225a(11) =256a(12) =361a(13) =400a(14) =625a(15) =841a(16) =900a(17) =1225a(18) =1296a(19) =1369a(20) =1444a(21) =1521a(22) =1600a(23) =1936a(24) =2025a(25) =2809a(26) =3025a(27) =3249a(28) =4225a(29) =4900