Smallest factor of 2^(2n+1)+(2n+1)^2.

Terms

a(0) =3a(1) =17a(2) =3a(3) =3a(4) =593a(5) =3a(6) =3a(7) =32993a(8) =3a(9) =3a(10) =2097593a(11) =3a(12) =3a(13) =73a(14) =3a(15) =3a(16) =8589935681a(17) =3a(18) =3a(19) =17a(20) =3a(21) =3a(22) =11a(23) =3a(24) =3a(25) =83a(26) =3a(27) =3a(28) =11a(29) =3