Primitive terms of A023197 that are of the form 4u+2.

Terms

a(0) =1890a(1) =3150a(2) =4410a(3) =6930a(4) =8190a(5) =10710a(6) =11550a(7) =11970a(8) =12870a(9) =13650a(10) =14490a(11) =14850a(12) =16170a(13) =16830a(14) =17850a(15) =18270a(16) =19110a(17) =19530a(18) =23310a(19) =25410a(20) =25830a(21) =27090a(22) =29610a(23) =30030a(24) =33390a(25) =37170a(26) =38430a(27) =39270a(28) =42210a(29) =43890