Squares of distinct elements in Pascal triangle.

Terms

a(0) =1a(1) =4a(2) =9a(3) =16a(4) =36a(5) =25a(6) =100a(7) =225a(8) =400a(9) =49a(10) =441a(11) =1225a(12) =64a(13) =784a(14) =3136a(15) =4900a(16) =81a(17) =1296a(18) =7056a(19) =15876a(20) =2025a(21) =14400a(22) =44100a(23) =63504a(24) =121a(25) =3025a(26) =27225a(27) =108900a(28) =213444a(29) =144