Numbers whose least quadratic nonresidue (A020649) is 2.

Terms

a(0) =3a(1) =4a(2) =5a(3) =6a(4) =8a(5) =9a(6) =10a(7) =11a(8) =12a(9) =13a(10) =15a(11) =16a(12) =18a(13) =19a(14) =20a(15) =21a(16) =22a(17) =24a(18) =25a(19) =26a(20) =27a(21) =28a(22) =29a(23) =30a(24) =32a(25) =33a(26) =35a(27) =36a(28) =37a(29) =38