Stirling transform of squares of Bell numbers: a(0)=1, a(n) = Sum_{k=1..n} Stirling2(n,k)*(bell(k))^2.
A069471
Stirling transform of squares of Bell numbers: a(0)=1, a(n) = Sum_{k=1..n} Stirling2(n,k)*(bell(k))^2.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =38a(4) =404a(5) =5640a(6) =98769a(7) =2099606a(8) =52883390a(9) =1549218221a(10) =52014755913
External references
- oeis: A069471