a(0) = 1; a(n) = Sum_{k=0..n-1} binomial(n,k)^2 * 2^(n-k-1) * a(k).
A340886
a(0) = 1; a(n) = Sum_{k=0..n-1} binomial(n,k)^2 * 2^(n-k-1) * a(k).
Terms
- a(0) =1a(1) =1a(2) =6a(3) =76a(4) =1720a(5) =60816a(6) =3096384a(7) =214579296a(8) =19422473088
External references
- oeis: A340886