a(n) = least k such that the remainder when 9^k is divided by k is n.

Terms

a(0) =2a(1) =7a(2) =6a(3) =5a(4) =38a(5) =723a(6) =74a(8) =11a(9) =3827a(10) =14a(11) =717a(12) =34a(13) =59035a(14) =21a(15) =259a(16) =152a(17) =237a(18) =62a(19) =626131a(20) =30a(21) =169a(22) =58a(23) =25a(24) =56a(25) =1921a(26) =39a(27) =361a(28) =65a(29) =49a(30) =63010