a(n) = least k such that the remainder when 5^k is divided by k is n.

Terms

a(0) =2a(1) =3a(2) =22a(3) =4769a(4) =7a(5) =15853a(6) =114a(7) =9a(8) =28a(9) =35a(10) =14a(11) =1328467a(12) =68a(13) =111a(14) =1555a(15) =9569200211a(16) =76a(17) =2030227a(18) =49a(19) =21a(20) =299a(21) =1097122717a(22) =51a(23) =546707a(24) =26a(25) =27a(26) =121a(27) =529a(28) =596a(29) =3095