26572086

Appears in sequences

• a(n) = 2 * Sum_{k=0..n-1} binomial(n-1, k)*binomial(n+k, k).at n=11A002003
• Number of points of L1 norm 11 in cubic lattice Z^n.at n=11A035605
• Coordination sequence for 11-dimensional cubic lattice.at n=11A035706
• Number of symmetric Schroeder paths of length 2n (A Schroeder path of length 2n is a lattice path from (0,0) to (2n,0) consisting of U=(1,1), D=(1,-1) and H=(2,0) steps and never going below the x-axis).at n=21A110110
• Row sums of A123160.at n=11A123164