a(0) = 0, a(1) = 1; a(n) = n * (n+1) * a(n-1) + a(n-2).

A346960

a(0) = 0, a(1) = 1; a(n) = n * (n+1) * a(n-1) + a(n-2).

Terms

    a(0) =0a(1) =1a(2) =6a(3) =73a(4) =1466a(5) =44053a(6) =1851692a(7) =103738805a(8) =7471045652a(9) =672497847485

External references