Numbers that are not Keith numbers in any base.

Terms

a(0) =12a(1) =30a(2) =390a(3) =1170a(4) =1200a(5) =1560a(6) =2340a(7) =2760a(8) =3120a(9) =3900a(10) =4680a(11) =6120a(12) =6240a(13) =7680a(14) =7800a(15) =8460a(16) =10020a(17) =10140a(18) =10950a(19) =11580a(20) =15090a(21) =15480a(22) =17160a(23) =17580a(24) =18360a(25) =19140a(26) =20280a(27) =20700a(28) =20940a(29) =21480