a(n) = Sum_{k=0..n} Stirling2(n,k)^k.
A345040
a(n) = Sum_{k=0..n} Stirling2(n,k)^k.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =12a(4) =268a(5) =25853a(6) =19339964a(7) =68901690994
External references
- oeis: A345040
A345040
a(n) = Sum_{k=0..n} Stirling2(n,k)^k.