173468

Appears in sequences

• E.g.f. satisfies A(x) = exp(x + x^2/2 * A(x)).at n=8A143740
• Number of n-step two-sided prudent self-avoiding walks ending on the top side of their box.at n=13A191652
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = n! * Sum_{j=0..floor(n/2)} (k/2)^j * (j+1)^(n-j-1) / (j! * (n-2*j)!).at n=53A362377