Carlitz-Riordan q-Catalan numbers (recurrence version) for q=4.

A015085

Carlitz-Riordan q-Catalan numbers (recurrence version) for q=4.

Terms

    a(0) =1a(1) =1a(2) =5a(3) =89a(4) =5885a(5) =1518897a(6) =1558435125

External references