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

A374319

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

Terms

    a(0) =1a(1) =1a(2) =1a(3) =4a(4) =8a(5) =31a(6) =82a(7) =274a(8) =1626a(9) =5135a(10) =26751a(11) =125489a(12) =1020692a(13) =4333707a(14) =31083613a(15) =132960104a(16) =1323145731a(17) =8282668312a(18) =70017330978a(19) =423293287673

External references