Number of maximal subsets of {1..n} such that it is possible to choose a different prime factor of each element.

A370585

Number of maximal subsets of {1..n} such that it is possible to choose a different prime factor of each element.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =2a(6) =5a(7) =5a(8) =7a(9) =11a(10) =25a(11) =25a(12) =38a(13) =38a(14) =84a(15) =150a(16) =178a(17) =178a(18) =235a(19) =235a(20) =341a(21) =579a(22) =1235a(23) =1235a(24) =1523a(25) =1968a(26) =4160a(27) =4824a(28) =6840a(29) =6840

External references