a(0) = 1; a(n) = (2/n) * Sum_{k=0..n-1} binomial(n,k)^2 * (n-k) * a(k).
A335501
a(0) = 1; a(n) = (2/n) * Sum_{k=0..n-1} binomial(n,k)^2 * (n-k) * a(k).
Terms
- a(0) =1a(1) =2a(2) =10a(3) =86a(4) =1098a(5) =19142a(6) =431926a(7) =12150518a(8) =414474570a(9) =16781350694a(10) =792845706630
External references
- oeis: A335501