291793

Appears in sequences

• E.g.f: exp(x/(1-2*x))/(1-2*x).at n=6A025167
• p(1,n), where the polynomial p(n,x) is defined in Comments; sum of the numbers in row n of the triangular array at A249130.at n=11A249131
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where T(n,k) = Sum_{j=0..n} k^j * j! * binomial(n,j)^2.at n=42A341014