Squares of odd elements in Pascal triangle that are not 1.

Terms

a(0) =9a(1) =9a(2) =25a(3) =25a(4) =225a(5) =225a(6) =49a(7) =441a(8) =1225a(9) =1225a(10) =441a(11) =49a(12) =81a(13) =81a(14) =2025a(15) =2025a(16) =121a(17) =3025a(18) =27225a(19) =27225a(20) =3025a(21) =121a(22) =245025a(23) =245025a(24) =169a(25) =511225a(26) =1656369a(27) =1656369a(28) =511225a(29) =169