911328

Appears in sequences

• Triangle read by rows: T(0,0) = 1, T(n,k) = Sum_{j=max(0,1-k)..n-k} (2^j)*(binomial(k+j,1+j) + binomial(k+j+1,1+j))*T(n-1,k-1+j).at n=16A085734
• T(n, k) = [x^k] (2*n)! [z^(2*n)] 1/cos(z)^x, triangle read by rows, for 0 <= k <= n.at n=23A088874
• Triangle read by rows: T(n,k) is the number of down-up permutations on [n] with k left-to-right maxima.at n=37A098906
• Coefficients of the Omega polynomials of order 2, triangle T(n,k) read by rows with 0<=k<=n.at n=23A318146
• Expansion of e.g.f. log(1 + (exp(2*x) - 1)/2)^2 / 2.at n=12A383165