Numbers n such that round(n^(1/k)) divides n for all integers k>=1.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =12a(5) =30a(6) =36a(7) =42a(8) =72a(9) =240a(10) =420a(11) =600a(12) =900a(13) =1560a(14) =1764a(15) =3600a(16) =6084a(17) =8100a(18) =46440a(19) =1742400a(20) =4062240a(21) =35814240