a(n) = Sum_{k=1..n} A060999(k) * k^3.

Terms

a(0) =0a(1) =8a(2) =89a(3) =537a(4) =2287a(5) =7471a(6) =20505a(7) =49689a(8) =108738a(9) =219738a(10) =416726a(11) =748502a(12) =1284570a(13) =2121490a(14) =3387115a(15) =5250795a(16) =7933293a(17) =11712429a(18) =16938987a(19) =24050987a(20) =33580556a(21) =46177140a(22) =62626924a(23) =83860588a(24) =110985588a(25) =145311516a(26) =188358237a(27) =241899165