41271

Appears in sequences

• Number of 4-tuples (w,x,y,z) with all terms in {1,...,n} and w*x>2*y*z.at n=19A211797
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 617", based on the 5-celled von Neumann neighborhood.at n=32A273248
• Number of triangular regions in an equilateral triangular "frame" of size n (see Comments in A328526 for definition).at n=19A333032