Odd numbers that are not of the form x^2 + y^2 + 10*z^2.

Terms

a(0) =3a(1) =7a(2) =21a(3) =31a(4) =33a(5) =43a(6) =67a(7) =79a(8) =87a(9) =133a(10) =217a(11) =219a(12) =223a(13) =253a(14) =307a(15) =391a(16) =679a(17) =2719