Numbers k such that k < d(k)^2, where d(k) = A000005(k).

Terms

a(0) =2a(1) =3a(2) =4a(3) =6a(4) =8a(5) =10a(6) =12a(7) =14a(8) =15a(9) =16a(10) =18a(11) =20a(12) =24a(13) =28a(14) =30a(15) =32a(16) =36a(17) =40a(18) =42a(19) =48a(20) =54a(21) =56a(22) =60a(23) =72a(24) =80a(25) =84a(26) =90a(27) =96a(28) =108a(29) =120