Pell pseudoprimes: odd composite numbers n such that P(n)-Kronecker(2,n) is divisible by n.

Terms

a(0) =169a(1) =385a(2) =741a(3) =961a(4) =1121a(5) =2001a(6) =3827a(7) =4879a(8) =5719a(9) =6215a(10) =6265a(11) =6441a(12) =6479a(13) =6601a(14) =7055a(15) =7801a(16) =8119a(17) =9799a(18) =10945a(19) =11395a(20) =13067a(21) =13079a(22) =13601a(23) =15841a(24) =18241a(25) =19097a(26) =20833a(27) =20951a(28) =24727a(29) =27839