Number of maximal subsets of {1..n} containing n such that it is possible to choose a different prime factor of each element (choosable).
A370590
Number of maximal subsets of {1..n} containing n such that it is possible to choose a different prime factor of each element (choosable).
Terms
- a(0) =0a(1) =0a(2) =1a(3) =1a(4) =1a(5) =2a(6) =3a(7) =5a(8) =2a(9) =4a(10) =14a(11) =25a(12) =13a(13) =38a(14) =46a(15) =66a(16) =28a(17) =178a(18) =57a(19) =235a(20) =106a(21) =238a(22) =656a(23) =1235a(24) =288a(25) =445a(26) =2192a(27) =664a(28) =2016a(29) =6840
External references
- oeis: A370590