a(0) = 1; a(n) = (1/n) * Sum_{k=2..n} (binomial(n,k) * k!)^2 * a(n-k) / k.
A346291
a(0) = 1; a(n) = (1/n) * Sum_{k=2..n} (binomial(n,k) * k!)^2 * a(n-k) / k.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =4a(4) =54a(5) =976a(6) =27050a(7) =1037016a(8) =53040344a(9) =3494603904a(10) =288738690552
External references
- oeis: A346291