Numbers k such that k^3 divides 13^(k^2) + 1.

Terms

a(0) =1a(1) =7a(2) =203a(3) =11977a(4) =154553a(5) =353423a(6) =3049963a(7) =4482037a(8) =5192537a(9) =7170569a(10) =9904979a(11) =20851957a(12) =33461911a(13) =35852033a(14) =69262991a(15) =88448927a(16) =160274303a(17) =264440183a(18) =306359683a(19) =381231473a(20) =423063571a(21) =978466699a(22) =1974252749a(23) =2115269947a(24) =4647954787a(25) =5218486693a(26) =6824905927a(27) =7803226417a(28) =9040206917a(29) =10041409007