a(n) = ( binomial(5*n,2*n)*binomial(5*n/2,2*n)*binomial(2*n,n)^2 ) / binomial(5*n/2,n)^2.
A352651
a(n) = ( binomial(5*n,2*n)*binomial(5*n/2,2*n)*binomial(2*n,n)^2 ) / binomial(5*n/2,n)^2.
Terms
- a(0) =1a(1) =12a(2) =378a(3) =14700a(4) =629850a(5) =28540512a(6) =1341310320a(7) =64676424384
External references
- oeis: A352651