a(n) = A135318(n)^2.

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =9a(5) =16a(6) =25a(7) =64a(8) =121a(9) =256a(10) =441a(11) =1024a(12) =1849a(13) =4096a(14) =7225a(15) =16384a(16) =29241a(17) =65536a(18) =116281a(19) =262144a(20) =466489a(21) =1048576a(22) =1863225a(23) =4194304a(24) =7458361a(25) =16777216a(26) =29822521a(27) =67108864a(28) =119311929a(29) =268435456