Catalan trisection: A000108(3*n+1), n>=0.

A187358

Catalan trisection: A000108(3*n+1), n>=0.

Terms

    a(0) =1a(1) =14a(2) =429a(3) =16796a(4) =742900a(5) =35357670a(6) =1767263190a(7) =91482563640

External references