Odd composite integers such that A005668(m)^2 == 1 (mod m).

Terms

a(0) =9a(1) =57a(2) =63a(3) =143a(4) =171a(5) =247a(6) =323a(7) =399a(8) =407a(9) =481a(10) =629a(11) =703a(12) =721a(13) =779a(14) =899a(15) =927a(16) =1121a(17) =1239a(18) =1407a(19) =1441a(20) =1463a(21) =1703a(22) =1729a(23) =2419a(24) =2529a(25) =2639a(26) =2737a(27) =3289a(28) =3367a(29) =3689