a(n) = B(n,n), where B(n,x) = Sum_{k=0..n} Stirling2(n,k)*x^k are the Bell polynomials (also known as exponential polynomials or Touchard polynomials).
A242817
a(n) = B(n,n), where B(n,x) = Sum_{k=0..n} Stirling2(n,k)*x^k are the Bell polynomials (also known as exponential polynomials or Touchard polynomials).
Terms
- a(0) =1a(1) =1a(2) =6a(3) =57a(4) =756a(5) =12880a(6) =268098a(7) =6593839a(8) =187104200a(9) =6016681467a(10) =216229931110
External references
- oeis: A242817