a(n) = Sum_{i=0..n} digsum(i)^4, where digsum(i) = A007953(i).

Terms

a(0) =0a(1) =1a(2) =17a(3) =98a(4) =354a(5) =979a(6) =2275a(7) =4676a(8) =8772a(9) =15333a(10) =15334a(11) =15350a(12) =15431a(13) =15687a(14) =16312a(15) =17608a(16) =20009a(17) =24105a(18) =30666a(19) =40666a(20) =40682a(21) =40763a(22) =41019a(23) =41644a(24) =42940a(25) =45341a(26) =49437a(27) =55998a(28) =65998a(29) =80639