The number of zeroless decimal numbers whose digital sum is n.

Terms

a(0) =0a(1) =1a(2) =2a(3) =4a(4) =8a(5) =16a(6) =32a(7) =64a(8) =128a(9) =256a(10) =511a(11) =1021a(12) =2040a(13) =4076a(14) =8144a(15) =16272a(16) =32512a(17) =64960a(18) =129792a(19) =259328a(20) =518145a(21) =1035269a(22) =2068498a(23) =4132920a(24) =8257696a(25) =16499120a(26) =32965728a(27) =65866496a(28) =131603200a(29) =262947072