Number of ordered set partitions of [n] where the maximal block size equals two.

A320758

Number of ordered set partitions of [n] where the maximal block size equals two.

Terms

    a(0) =1a(1) =6a(2) =42a(3) =330a(4) =2970a(5) =30240a(6) =345240a(7) =4377240a(8) =61122600a(9) =933055200a(10) =15470254800a(11) =277005128400

External references