a(n) = least k such that the remainder when 19^k is divided by k is n.

Terms

a(0) =2a(1) =17a(2) =358a(3) =5a(4) =7a(5) =13a(6) =118a(7) =11a(8) =22a(9) =207a(10) =14a(11) =6683a(12) =21a(13) =1055a(14) =221a(15) =6843a(16) =86a(17) =39959a(18) =23a(19) =559a(20) =34a(21) =129a(22) =26a(23) =25a(24) =51a(25) =799a(26) =334a(27) =33a(28) =166a(29) =47427581