Partials sums of the cubefull numbers (A036966).

Terms

a(0) =1a(1) =9a(2) =25a(3) =52a(4) =84a(5) =148a(6) =229a(7) =354a(8) =482a(9) =698a(10) =941a(11) =1197a(12) =1540a(13) =1972a(14) =2484a(15) =3109a(16) =3757a(17) =4486a(18) =5350a(19) =6350a(20) =7374a(21) =8670a(22) =10001a(23) =11729a(24) =13673a(25) =15673a(26) =17721a(27) =19908a(28) =22105a(29) =24506