Numbers whose total number of prime factors (counting multiplicity) is squarefree.

Terms

a(0) =2a(1) =3a(2) =4a(3) =5a(4) =6a(5) =7a(6) =8a(7) =9a(8) =10a(9) =11a(10) =12a(11) =13a(12) =14a(13) =15a(14) =17a(15) =18a(16) =19a(17) =20a(18) =21a(19) =22a(20) =23a(21) =25a(22) =26a(23) =27a(24) =28a(25) =29a(26) =30a(27) =31a(28) =32a(29) =33