a(0) = 1; a(n) = Sum_{k=0..n-1} (k+1) * binomial(k+4,4) * binomial(n-1,k) * a(k) * a(n-1-k).
A385981
a(0) = 1; a(n) = Sum_{k=0..n-1} (k+1) * binomial(k+4,4) * binomial(n-1,k) * a(k) * a(n-1-k).
Terms
- a(0) =1a(1) =1a(2) =11a(3) =526a(4) =75981a(5) =27017601a(6) =20599793857
External references
- oeis: A385981