Smallest multiple of n with digit sum = 7, or 0 if no such number exists, e.g. a(3k)= a(11k) = 0.

Terms

a(0) =7a(1) =16a(2) =0a(3) =16a(4) =25a(5) =0a(6) =7a(7) =16a(8) =0a(9) =70a(10) =0a(11) =0a(12) =52a(13) =70a(14) =0a(15) =16a(16) =34a(17) =0a(18) =133a(19) =160a(20) =0a(21) =0a(22) =115a(23) =0a(24) =25a(25) =52a(26) =0a(27) =700a(28) =232a(29) =0