33464927

Appears in sequences

• Numerators of coefficients in power series for -log(1+x)*log(1-x).at n=9A049281
• Numerator of the n-th alternating harmonic number, Sum_{k=1..n} (-1)^(k+1)/k.at n=18A058313
• Let u(1) = x and u(n+1) = (n^2/u(n)) + 1 for n >= 1; then a(n) is such that u(n) =(a(n)*x + b(n))/(c(n)*x + d(n)) (in lowest terms) and a(n), b(n), c(n), d(n) are positive integers.at n=18A075827
• Let u(1) = x and u(n+1) = (n^2/u(n)) + 1 for n >= 1; then a(n) is such that u(n) = (b(n)*x + c(n))/(a(n)*x + d(n)) (in lowest terms) and a(n), b(n), c(n), d(n) are positive integers.at n=19A075830
• Numerator of the product of n and the n-th alternating harmonic number, Sum_{k=1..n} (-1)^(k+1)/k.at n=18A119787
• a(n) is the numerator of the n-th hyperharmonic number of order n.at n=9A354894