a(n+1) = (n+1)*a(n) + Sum_{k=1..n-1} a(k)*a(n-k).
A006014
a(n+1) = (n+1)*a(n) + Sum_{k=1..n-1} a(k)*a(n-k).
Terms
- a(0) =1a(1) =2a(2) =7a(3) =32a(4) =178a(5) =1160a(6) =8653a(7) =72704a(8) =679798a(9) =7005632a(10) =78939430a(11) =965988224a(12) =12762344596a(13) =181108102016
External references
- oeis: A006014