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

A006099

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

Terms

    a(0) =1a(1) =1a(2) =3a(3) =7a(4) =35a(5) =155a(6) =1395a(7) =11811a(8) =200787a(9) =3309747a(10) =109221651a(11) =3548836819a(12) =230674393235

External references