a(n) = binomial(2*n, n) * binomial(2*n+5, n).

A113894

a(n) = binomial(2*n, n) * binomial(2*n+5, n).

Terms

    a(0) =1a(1) =14a(2) =216a(3) =3300a(4) =50050a(5) =756756a(6) =11435424a(7) =172931616a(8) =2618916300a(9) =39731777800a(10) =603923022560

External references