a(n) = least k such that the remainder when 7^k is divided by k is n.

Terms

a(0) =2a(1) =5a(2) =46a(3) =339a(4) =22a(5) =387497a(6) =11a(7) =535a(8) =10a(9) =111a(10) =38a(11) =8399a(12) =15a(13) =497a(14) =34a(15) =327a(16) =365a(17) =515a(18) =30a(19) =7219931a(20) =28a(21) =321a(22) =26a(23) =223793a(24) =44a(25) =10718597a(26) =242a(27) =35a(28) =2330a(29) =209