a(0) = 1; a(n) = a(n-1) + Sum_{k=0..n-1} (1 + k) * binomial(k+1,2) * binomial(n-1,k) * a(k) * a(n-1-k).
A386510
a(0) = 1; a(n) = a(n-1) + Sum_{k=0..n-1} (1 + k) * binomial(k+1,2) * binomial(n-1,k) * a(k) * a(n-1-k).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =34a(4) =949a(5) =52421a(6) =5050711a(7) =779516095a(8) =181069531665
External references
- oeis: A386510