a(n) = A002596(n)^2.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =25a(5) =49a(6) =441a(7) =1089a(8) =184041a(9) =511225a(10) =5909761a(11) =17631601a(12) =863948449a(13) =2704312009a(14) =34493775625a(15) =111759833025