a(n) = Sum_{k=1..n} (-1)^(n-k) * Stirling1(n,k) * (k-1)! * tau(k), where tau = A000005.
A330493
a(n) = Sum_{k=1..n} (-1)^(n-k) * Stirling1(n,k) * (k-1)! * tau(k), where tau = A000005.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =70a(4) =492a(5) =4298a(6) =43894a(7) =514666a(8) =6830888a(9) =101473632a(10) =1664125944a(11) =29858266392a(12) =582481147440
External references
- oeis: A330493