Numbers representable as Phi(k,2), the k-th cyclotomic polynomial evaluated at 2, for some k>0.

Terms

a(0) =1a(1) =3a(2) =5a(3) =7a(4) =11a(5) =13a(6) =17a(7) =31a(8) =43a(9) =57a(10) =73a(11) =127a(12) =151a(13) =205a(14) =241a(15) =257a(16) =331a(17) =683a(18) =2047a(19) =2359a(20) =2731a(21) =3277a(22) =4033a(23) =5419a(24) =8191a(25) =43691a(26) =61681a(27) =65281a(28) =65537a(29) =80581