Even cubes: a(n) = (2*n)^3.

Terms

a(0) =0a(1) =8a(2) =64a(3) =216a(4) =512a(5) =1000a(6) =1728a(7) =2744a(8) =4096a(9) =5832a(10) =8000a(11) =10648a(12) =13824a(13) =17576a(14) =21952a(15) =27000a(16) =32768a(17) =39304a(18) =46656a(19) =54872a(20) =64000a(21) =74088a(22) =85184a(23) =97336a(24) =110592a(25) =125000a(26) =140608a(27) =157464a(28) =175616a(29) =195112