A binomial recursion : a(n) = q(n) (see formula).

A135075

A binomial recursion : a(n) = q(n) (see formula).

Terms

    a(0) =0a(1) =1a(2) =5a(3) =33a(4) =265a(5) =2505a(6) =27261a(7) =335757a(8) =4617461a(9) =70138689a(10) =1166295457a(11) =21072290241a(12) =411069239997

External references