a(n) = Sum_{k=0..n} 2^k * binomial(4*n+1,k) * binomial(4*n-k,n-k).
A384366
a(n) = Sum_{k=0..n} 2^k * binomial(4*n+1,k) * binomial(4*n-k,n-k).
Terms
- a(0) =1a(1) =14a(2) =298a(3) =7058a(4) =175594a(5) =4494104a(6) =117160486a(7) =3094165004a(8) =82503894826
External references
- oeis: A384366