Largest proper divisor of n^3.

Terms

a(0) =4a(1) =9a(2) =32a(3) =25a(4) =108a(5) =49a(6) =256a(7) =243a(8) =500a(9) =121a(10) =864a(11) =169a(12) =1372a(13) =1125a(14) =2048a(15) =289a(16) =2916a(17) =361a(18) =4000a(19) =3087a(20) =5324a(21) =529a(22) =6912a(23) =3125a(24) =8788a(25) =6561a(26) =10976a(27) =841a(28) =13500a(29) =961