a(n) = 16^n*Sum_{i=0..n} 2^i*binomial(n, i)*Catalan(2*n-i).
A308815
a(n) = 16^n*Sum_{i=0..n} 2^i*binomial(n, i)*Catalan(2*n-i).
Terms
- a(0) =1a(1) =0a(2) =512a(3) =32768a(4) =3014656a(5) =285212672a(6) =28521267200
External references
- oeis: A308815
A308815
a(n) = 16^n*Sum_{i=0..n} 2^i*binomial(n, i)*Catalan(2*n-i).