Gaussian binomial coefficient [ n,n/2 ] for q=4.

A006109

Gaussian binomial coefficient [ n,n/2 ] for q=4.

Terms

    a(0) =1a(1) =1a(2) =5a(3) =21a(4) =357a(5) =5797a(6) =376805a(7) =24208613a(8) =6221613541

External references