358788696

Appears in sequences

• a(n) = a(n,m) = Sum_{k=0..n} binomial(m*k,k)*binomial(m*(n-k),n-k) for m=7.at n=7A079563
• a(n) = Sum_{k=0..n} binomial(n*k,k) * binomial(n*(n-k),n-k).at n=7A358145