Greatest prime factor of A104357(n) = A104350(n) - 1.

Terms

a(0) =1a(1) =5a(2) =11a(3) =59a(4) =179a(5) =1259a(6) =229a(7) =7559a(8) =37799a(9) =415799a(10) =17569a(11) =71437a(12) =18979a(13) =62597a(14) =1135133999a(15) =1646947a(16) =445771a(17) =277021a(19) =2217247573a(20) =721381a(21) =46313123a(23) =16347569521a(24) =5464930609a(25) =4939567a(28) =178974179a(29) =15701603a(31) =126202964557