a(n) = n*(n + 1)^3.

Terms

a(0) =0a(1) =8a(2) =54a(3) =192a(4) =500a(5) =1080a(6) =2058a(7) =3584a(8) =5832a(9) =9000a(10) =13310a(11) =19008a(12) =26364a(13) =35672a(14) =47250a(15) =61440a(16) =78608a(17) =99144a(18) =123462a(19) =152000a(20) =185220a(21) =223608a(22) =267674a(23) =317952a(24) =375000a(25) =439400a(26) =511758a(27) =592704a(28) =682892a(29) =783000