a(0) = 1; a(n) = (1/n) * Sum_{k=3..n} (binomial(n,k) * k!)^2 * a(n-k) / k.
A346292
a(0) = 1; a(n) = (1/n) * Sum_{k=3..n} (binomial(n,k) * k!)^2 * a(n-k) / k.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =4a(4) =36a(5) =576a(6) =17600a(7) =694800a(8) =35802144a(9) =2391438336a(10) =200018045952
External references
- oeis: A346292