a(n) = A045873(n)^2.

Terms

a(0) =1a(1) =4a(2) =1a(3) =144a(4) =361a(5) =484a(6) =19321a(7) =28224a(8) =128881a(9) =2427364a(10) =1745041a(11) =26501904a(12) =285643801a(13) =64995844a(14) =4675961161a(15) =31354493184a(16) =149793121a(17) =741117817924a(19) =545370434064