Number of subsets of {1..n} such that only one set can be obtained by choosing a different prime factor of each element.
A370584
Number of subsets of {1..n} such that only one set can be obtained by choosing a different prime factor of each element.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =6a(5) =12a(6) =18a(7) =36a(8) =48a(9) =68a(10) =104a(11) =208a(12) =284a(13) =568a(14) =888a(15) =1296a(16) =1548a(17) =3096a(18) =3968a(19) =7936a(20) =10736a(21) =15440a(22) =24008a(23) =48016a(24) =58848a(25) =73680a(26) =114368a(27) =132608a(28) =176240a(29) =352480
External references
- oeis: A370584