Carlitz-Riordan q-Catalan numbers (recurrence version) for q=2.

A015083

Carlitz-Riordan q-Catalan numbers (recurrence version) for q=2.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =17a(4) =171a(5) =3113a(6) =106419a(7) =7035649a(8) =915028347a(9) =236101213721

External references