Semiprimes p*q such that 2^p mod q == 2^q mod p.

Terms

a(0) =4a(1) =9a(2) =25a(3) =49a(4) =121a(5) =169a(6) =289a(7) =341a(8) =361a(9) =529a(10) =731a(11) =841a(12) =961a(13) =1333a(14) =1369a(15) =1387a(16) =1681a(17) =1727a(18) =1849a(19) =2047a(20) =2209a(21) =2701a(22) =2809a(23) =3277a(24) =3481a(25) =3503a(26) =3721a(27) =3763a(28) =4033a(29) =4369