Number of 5-tuples (p_1, p_2, ..., p_5) of Dyck paths of semilength n, such that each p_i is never below p_{i-1}.

A006151

Number of 5-tuples (p_1, p_2, ..., p_5) of Dyck paths of semilength n, such that each p_i is never below p_{i-1}.

Terms

    a(0) =1a(1) =1a(2) =6a(3) =91a(4) =2548a(5) =111384a(6) =6852768a(7) =553361016a(8) =55804330152

External references