a(n) = (5n+2)^3.

Terms

a(0) =8a(1) =343a(2) =1728a(3) =4913a(4) =10648a(5) =19683a(6) =32768a(7) =50653a(8) =74088a(9) =103823a(10) =140608a(11) =185193a(12) =238328a(13) =300763a(14) =373248a(15) =456533a(16) =551368a(17) =658503a(18) =778688a(19) =912673a(20) =1061208a(21) =1225043a(22) =1404928a(23) =1601613a(24) =1815848a(25) =2048383