Squares present in A259934.

Terms

a(0) =0a(1) =121a(2) =144a(3) =113569a(4) =123904a(5) =398161a(6) =399424a(7) =1708249a(8) =1710864a(9) =24591681a(10) =24681024a(11) =53890281a(12) =53934336a(13) =184063489a(14) =184742464a(15) =8338063969a(16) =8339342400a(17) =470959650225a(18) =470972003076