Numbers k such that all primes dividing the k-th composite number divide k as well.

Terms

a(0) =6a(1) =15a(2) =20a(3) =24a(4) =30a(5) =96a(6) =168a(7) =189a(8) =300a(9) =348a(10) =414a(11) =510a(12) =660a(13) =1260a(14) =1458a(15) =1738a(16) =2214a(17) =2805a(18) =3010a(19) =3984a(20) =4330a(21) =4485a(22) =5798a(23) =5859a(24) =5880a(25) =6360a(26) =7364a(27) =7420a(28) =7656a(29) =8245