a(n) = smallest multiple of 7 with a digit sum = n.

Terms

a(0) =1001a(1) =21a(2) =112a(3) =14a(4) =42a(5) =7a(6) =35a(7) =63a(8) =28a(9) =56a(10) =84a(11) =49a(12) =77a(13) =168a(14) =196a(15) =98a(16) =189a(17) =469a(18) =497a(19) =399a(20) =679a(21) =896a(22) =798a(23) =889a(24) =1799a(25) =2898a(26) =2989a(27) =3899a(28) =4998a(29) =6979