223191

Appears in sequences

• Binomial transform of Catalan numbers.at n=10A007317
• Least nondecreasing sequence with a(1) = 1 and Hankel transform {1,1,1,1,...}.at n=20A055879
• Least nondecreasing sequence with a(1) = 1 and Hankel transform {1,1,1,1,...}.at n=21A055879
• Triangle read by rows: T(n,k) is the number of Schroeder paths of length 2n and having k peaks at even height.at n=45A101895
• Triangle read by rows: T(n,k) (0 <= k <= floor(n/2)) is the number of lattice paths from (0,0) to (2n,0) consisting of steps U=(1,1), D=(1,-1), H=(2,0), never going below the x-axis (i.e., Schroeder paths) and having k UH's.at n=30A110220
• G.f.: (1/2)*(3 - sqrt((1-5*x)/(1-x))).at n=11A181768
• Number of branching factorizations of the least integer of each prime signature (A025487).at n=50A366884