Largest square <= n^3.

Terms

a(0) =0a(1) =1a(2) =4a(3) =25a(4) =64a(5) =121a(6) =196a(7) =324a(8) =484a(9) =729a(10) =961a(11) =1296a(12) =1681a(13) =2116a(14) =2704a(15) =3364a(16) =4096a(17) =4900a(18) =5776a(19) =6724a(20) =7921a(21) =9216a(22) =10609a(23) =12100a(24) =13689a(25) =15625a(26) =17424a(27) =19600a(28) =21904a(29) =24336