19510

Appears in sequences

• a(n) is the least k such that f(a(n-1)+1) + ... + f(k) > f(a(n-2)+1) + ... + f(a(n-1)) for n > 1, where f(n) = 1/(n+3) and a(1) = 1.at n=8A225918
• Expansion of Product_{k>=1} ((1 - x^(3*k))/(1 - x^k))^k.at n=18A263346
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 379", based on the 5-celled von Neumann neighborhood.at n=30A271537
• a(n) is the number of distinct triangles whose sides do not pass through a grid point and whose vertices are three points of an n X n grid.at n=29A372217