Carmichael numbers k such that Euler totient function of k (phi(k)) is a perfect square.

Terms

a(0) =1729a(1) =63973a(2) =75361a(3) =172081a(4) =278545a(5) =340561a(6) =658801a(7) =997633a(8) =1773289a(9) =3224065a(10) =5310721a(11) =8719309a(12) =8719921a(13) =12945745a(14) =13187665a(15) =15888313a(16) =17586361a(17) =27402481a(18) =29020321a(19) =39353665a(20) =40430401a(21) =49333201a(22) =67371265a(23) =84417985a(24) =120981601a(25) =128697361a(26) =129255841a(27) =130032865a(28) =151530401a(29) =151813201