520817

Appears in sequences

• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 613", based on the 5-celled von Neumann neighborhood.at n=18A283294
• Expansion of Sum_{k>=1} (-1 + Product_{j>=1} (1 + x^(k*j))^j).at n=27A302550