Composite numbers k such that Pell(k) == 1 (mod k).

Terms

a(0) =35a(1) =169a(2) =385a(3) =899a(4) =961a(5) =1121a(6) =2001a(7) =3107a(8) =4879a(9) =4901a(10) =5719a(11) =6215a(12) =6265a(13) =6441a(14) =6479a(15) =6601a(16) =7055a(17) =7801a(18) =8119a(19) =8339a(20) =9799a(21) =10403a(22) =10763a(23) =10945a(24) =13079a(25) =13601a(26) =15841a(27) =18241a(28) =19097a(29) =20833