Numbers k such that 13^k == 15 (mod k).

Terms

a(0) =1a(1) =2a(2) =14a(3) =22a(4) =1582a(5) =11266a(6) =52766a(7) =76202a(8) =100562a(9) =494371a(10) =641141a(11) =1698494a(12) =66593158a(13) =469296521a(14) =10917186079a(15) =12062558662