Let Cn(x) be the n-th cyclotomic polynomial; a(n) is the first prime Cn(x) after Cn(1).

Terms

a(0) =2a(1) =3a(2) =7a(3) =5a(4) =31a(5) =3a(6) =127a(7) =17a(8) =73a(9) =11a(10) =12207031a(11) =13a(12) =8191a(13) =43a(14) =151a(15) =257a(16) =131071a(17) =46441a(18) =524287a(19) =61681a(20) =368089a(21) =683a(23) =241a(25) =2731a(26) =262657a(27) =15790321a(29) =331a(30) =2147483647a(31) =65537a(32) =599479