a(n) = Sum_{i=0..n} digsum_5(i)^3, where digsum_5(i) = A053824(i).

Terms

a(0) =0a(1) =1a(2) =9a(3) =36a(4) =100a(5) =101a(6) =109a(7) =136a(8) =200a(9) =325a(10) =333a(11) =360a(12) =424a(13) =549a(14) =765a(15) =792a(16) =856a(17) =981a(18) =1197a(19) =1540a(20) =1604a(21) =1729a(22) =1945a(23) =2288a(24) =2800a(25) =2801a(26) =2809a(27) =2836a(28) =2900a(29) =3025