Number of partitions of [n] such that the number of blocks of size k is a multiple or a divisor of k for every k.

A374329

Number of partitions of [n] such that the number of blocks of size k is a multiple or a divisor of k for every k.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =52a(6) =178a(7) =702a(8) =3160a(9) =15267a(10) =72904a(11) =401139a(12) =2473320a(13) =15932022a(14) =99025826a(15) =641593206a(16) =4570555035a(17) =35589342752a(18) =281312386194

External references