a(n) = (n+1)^2 * (n!)^3 * Sum_{k=1..n} 1/((k+1)^2 * (k!)^3).
A368789
a(n) = (n+1)^2 * (n!)^3 * Sum_{k=1..n} 1/((k+1)^2 * (k!)^3).
Terms
- a(0) =0a(1) =1a(2) =19a(3) =913a(4) =91301a(5) =16434181a(6) =4831649215
External references
- oeis: A368789
A368789
a(n) = (n+1)^2 * (n!)^3 * Sum_{k=1..n} 1/((k+1)^2 * (k!)^3).