613470

Appears in sequences

• Product of two successive Catalan numbers C(n)*C(n+1).at n=7A005568
• a(n) = C(floor(n/2 + 1/2))*C(floor(n/2 + 1)) where C(i) = Catalan numbers A000108.at n=14A005817
• Square array read by antidiagonals of number of length 2k walks on an n-dimensional hypercubic lattice starting and finishing at the origin and staying in the nonnegative part.at n=47A064045
• Expansion of 3F2( 1, 3/2, 3/2; 3, 4;16 x).at n=7A186264
• Numbers A055744(n) such that for any k < n, A055744(k) and A055744(n) do not have all their prime factors in common.at n=45A256431
• a(n) = floor(C(n/2)*C(n/2+1)), where C = Catalan numbers (A000108).at n=14A302093
• Triangle read by rows: T(n, k) is the number of walks of length 2*n on the N X N grid with unit steps in all four directions (NSWE) starting at (0, 0). k is the common value of the x- and the y-coordinate of the endpoint of the walk.at n=28A380119