Number of partitions of a 2n-set into colored blocks, such that exactly n colors are used and the colors are introduced in increasing order.

A321712

Number of partitions of a 2n-set into colored blocks, such that exactly n colors are used and the colors are introduced in increasing order.

Terms

    a(0) =1a(1) =2a(2) =32a(3) =945a(4) =40992a(5) =2350950a(6) =167829629a(7) =14342726398

External references