4102737925

Appears in sequences

• Denominator of b(n) given by b(1) = 1, b(2) = 2; for n >= 3, b(n) = (-1)^n (2n-1) ((n-2)!!)^2/((n-1)!!)^2, where n!! is the double factorial A006882.at n=19A095175
• Denominators in the fractional coefficients that form the partial quotients of the continued fraction representation of the inverse tangent of 1/x.at n=19A110256
• Denominators in the coefficients that form the even-indexed partial quotients of the continued fraction representation of the inverse tangent of 1/x.at n=9A110260