Semiprimes k = pq such that p^k == p (mod k) and q^k == q (mod k).

Terms

a(0) =65a(1) =133a(2) =301a(3) =793a(4) =2041a(5) =2413a(6) =2501a(7) =2701a(8) =3781a(9) =4699a(10) =5617a(11) =5963a(12) =7081a(13) =7991a(14) =9073a(15) =9881a(16) =9937a(17) =10261a(18) =10349a(19) =12209a(20) =13213a(21) =13333a(22) =14111a(23) =14981a(24) =18721a(25) =20737a(26) =24727a(27) =27133a(28) =31201a(29) =31621