Denominator of (binomial(2*n-2,n-1)/n!)^2.

A005017

Denominator of (binomial(2*n-2,n-1)/n!)^2.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =36a(4) =144a(5) =400a(6) =3600a(7) =2822400a(8) =16257024a(9) =32920473600a(10) =823011840000

External references