25937683

Appears in sequences

• a(n) = Sum_{k=0..n} binomial(n, k)*|S1(n, k)|.at n=9A211210
• Triangle read by rows, T(n,k) = Sum_{j=0..n} (-1)^(n-j)*C(-j-1,-n-1)*S1(k,j), S1 the Stirling cycle numbers A132393, for n>=0 and 0<=k<=n.at n=54A271700