a(n) = {n^2}_{n^2}.

Terms

a(0) =1a(1) =4a(2) =9a(3) =22a(4) =55a(5) =114a(6) =205a(7) =388a(8) =649a(9) =10000a(10) =14884a(11) =21316a(12) =29584a(13) =40186a(14) =101705a(15) =132358a(16) =169363a(17) =315580a(18) =393130a(19) =640000a(20) =779689a(21) =940900a(22) =1400272a(23) =1662918a(24) =2345005a(25) =2746594a(26) =3721554a(27) =4308868a(28) =5661613a(29) =7290000