2797568

Appears in sequences

• Number of walks of length n along the edges of an octahedron starting and ending at a vertex and also ( with a(0)=0 ) between two opposite vertices.at n=12A054881
• G.f.: (1+14*x+x^2)^3/((1-x))^4.at n=17A113922
• Number of 2Xn 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=14A302323
• Number of rational knots (or two-bridge knots) with n crossings (chiral pairs counted as distinct).at n=23A336398