Number of subsets of {1..n} whose elements have the same number of prime factors, counted with multiplicity.

A339511

Number of subsets of {1..n} whose elements have the same number of prime factors, counted with multiplicity.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =5a(4) =6a(5) =10a(6) =12a(7) =20a(8) =21a(9) =25a(10) =33a(11) =49a(12) =51a(13) =83a(14) =99a(15) =131a(16) =132a(17) =196a(18) =200a(19) =328a(20) =336a(21) =400a(22) =528a(23) =784a(24) =786a(25) =1042a(26) =1554a(27) =1570a(28) =1602a(29) =2114

External references