Squares ending in a different nonzero square.

Terms

a(0) =49a(1) =64a(2) =81a(3) =121a(4) =144a(5) =169a(6) =225a(7) =289a(8) =324a(9) =361a(10) =441a(11) =484a(12) =529a(13) =625a(14) =729a(15) =784a(16) =841a(17) =961a(18) =1024a(19) =1089a(20) =1225a(21) =1369a(22) =1444a(23) =1521a(24) =1681a(25) =1764a(26) =1849a(27) =1936a(28) =2025a(29) =2116