a(n) = (10*n + 8)^3.

Terms

a(0) =512a(1) =5832a(2) =21952a(3) =54872a(4) =110592a(5) =195112a(6) =314432a(7) =474552a(8) =681472a(9) =941192a(10) =1259712a(11) =1643032a(12) =2097152a(13) =2628072a(14) =3241792a(15) =3944312a(16) =4741632a(17) =5639752a(18) =6644672a(19) =7762392a(20) =8998912a(21) =10360232a(22) =11852352a(23) =13481272a(24) =15252992a(25) =17173512a(26) =19248832