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

A374321

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

Terms

    a(0) =1a(1) =1a(2) =0a(3) =0a(4) =3a(5) =15a(6) =0a(7) =0a(8) =0a(9) =280a(10) =2800a(11) =0a(12) =0a(13) =600600a(14) =8408400a(15) =0a(16) =2627625a(17) =44669625a(18) =0a(19) =0a(20) =38192529375a(21) =802043116875a(22) =0a(23) =0a(24) =0a(27) =0a(28) =0a(31) =0a(32) =0a(33) =0

External references