272976

Appears in sequences

• Number of peaks at even level in all Schroeder paths (i.e., consisting of steps U=(1,1), D=(1,-1), H=(2,0) and never going below the axis) from (0,0) to (2n+4,0).at n=7A089383
• G.f.: A(x) = x*exp( Sum_{n>=1} [ D^n A(x) ]^n/n ), where differential operator D = x*d/dx.at n=7A159594
• Monotonic ordering of nonnegative differences 5^i-7^j, for 40>= i>=0, j>=0.at n=27A192195
• Left-hand half of triangle A297193.at n=43A297194
• (1/4) * number of ways to select 3 distinct collinear points from a square of grid points with side length n.at n=32A320540