a(n) = Sum_{i=0..n} digsum_3(i)^4, where digsum_3(i) = A053735(i).

Terms

a(0) =0a(1) =1a(2) =17a(3) =18a(4) =34a(5) =115a(6) =131a(7) =212a(8) =468a(9) =469a(10) =485a(11) =566a(12) =582a(13) =663a(14) =919a(15) =1000a(16) =1256a(17) =1881a(18) =1897a(19) =1978a(20) =2234a(21) =2315a(22) =2571a(23) =3196a(24) =3452a(25) =4077a(26) =5373a(27) =5374a(28) =5390a(29) =5471