Positive integers n such that 13^n == 7 (mod n).

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =15a(5) =75a(6) =219a(7) =1335a(8) =3246a(9) =4975a(10) =5475a(11) =7775a(12) =8922a(13) =28614a(14) =67675a(15) =69998a(16) =103135a(17) =313609a(18) =548983a(19) =624193a(20) =6539595a(21) =13193562a(22) =26383395a(23) =111892866a(24) =315953675a(25) =5330142066a(26) =33738816835a(27) =66899423586a(28) =336966134829a(29) =645835313441