Integer averages of halves of first cubes of natural numbers (n^3)/2 for some n.

Terms

a(0) =6a(1) =56a(2) =81a(3) =198a(4) =480a(5) =578a(6) =950a(7) =1656a(8) =1875a(9) =2646a(10) =3968a(11) =4356a(12) =5670a(13) =7800a(14) =8405a(15) =10406a(16) =13536a(17) =14406a(18) =17238a(19) =21560a(20) =22743a(21) =26550a(22) =32256a(23) =33800a(24) =38726a(25) =46008a(26) =47961a(27) =54150a(28) =63200a(29) =65610