Integer averages of the first perfect cubes up to some n^3.

Terms

a(0) =1a(1) =12a(2) =25a(3) =45a(4) =112a(5) =162a(6) =225a(7) =396a(8) =507a(9) =637a(10) =960a(11) =1156a(12) =1377a(13) =1900a(14) =2205a(15) =2541a(16) =3312a(17) =3750a(18) =4225a(19) =5292a(20) =5887a(21) =6525a(22) =7936a(23) =8712a(24) =9537a(25) =11340a(26) =12321a(27) =13357a(28) =15600a(29) =16810