261802

Appears in sequences

• a(n) = 2^n - n^2 - n.at n=18A220588
• a(n) = phi(2^n) - phi(n^2), with Euler's totient function phi = A000010.at n=18A248643
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 485", based on the 5-celled von Neumann neighborhood.at n=17A288594
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 597", based on the 5-celled von Neumann neighborhood.at n=17A289764
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 605", based on the 5-celled von Neumann neighborhood.at n=17A289887