Number of hypoplactic classes of 4-parking functions of length n.

A243676

Number of hypoplactic classes of 4-parking functions of length n.

Terms

    a(0) =1a(1) =1a(2) =9a(3) =113a(4) =1649a(5) =26225a(6) =440985a(7) =7711009a(8) =138792929a(9) =2554489505a(10) =47854963881a(11) =909495557393

External references