Number of partitions of [2n] that have at most one block contained in [n].

A367820

Number of partitions of [2n] that have at most one block contained in [n].

Terms

    a(0) =1a(1) =2a(2) =13a(3) =153a(4) =2744a(5) =68303a(6) =2224417a(7) =90995838a(8) =4538437039a(9) =269755223485

External references