Number of partitions of 2n-set in which number of blocks of size k is even (or zero) for every k.

A130219

Number of partitions of 2n-set in which number of blocks of size k is even (or zero) for every k.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =56a(4) =631a(5) =15457a(6) =582374a(7) =18589286a(8) =894499204a(9) =51154344582

External references