8589869057

Appears in sequences

• a(n) = (-1)^(n+1) * coefficient of x^n in Sum_{k>=1} x^k/(1+2*x^k).at n=33A081295
• a(n) = 2^(n-1)*(2^n - 1) + 1.at n=17A134169
• Nearest-neighbors of perfect numbers.at n=11A135606
• Perfect numbers plus 1.at n=5A135629
• 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 809", based on the 5-celled von Neumann neighborhood.at n=32A286857
• 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 553", based on the 5-celled von Neumann neighborhood.at n=32A289268
• a(n) = Sum_{d|n} (-1)^(d-1) * 2^(n/d-1).at n=33A373275