Sum of the n smallest numbers having the sum of their digits equal to n.

Terms

a(0) =1a(1) =13a(2) =36a(3) =70a(4) =115a(5) =171a(6) =238a(7) =316a(8) =405a(9) =604a(10) =868a(11) =1197a(12) =1591a(13) =2158a(14) =2844a(15) =3829a(16) =5140a(17) =6939a(18) =9415a(19) =12100a(20) =14994a(21) =18493a(22) =26062a(23) =34650a(24) =49414a(25) =69535a(26) =96534a(27) =129412a(28) =164299a(29) =201195