a(n) = n^6 - n^5.

Terms

a(0) =0a(1) =0a(2) =32a(3) =486a(4) =3072a(5) =12500a(6) =38880a(7) =100842a(8) =229376a(9) =472392a(10) =900000a(11) =1610510a(12) =2737152a(13) =4455516a(14) =6991712a(15) =10631250a(16) =15728640a(17) =22717712a(18) =32122656a(19) =44569782a(20) =60800000a(21) =81682020a(22) =108226272a(23) =141599546a(24) =183140352a(25) =234375000a(26) =297034400a(27) =373071582a(28) =464679936