221930581

Appears in sequences

• Denominator of Pi^(2n)/(Gamma(2n)*(1-2^(-2n))*zeta(2n)).at n=9A002425
• Numerators of coefficients in Taylor series expansion of log(cosec(x)*tanh(x)).at n=10A012860
• Numerators of Taylor series for log(1/cos(x)). Also from log(cos(x)).at n=10A046990
• Numerator of S(n)/Pi^n, where S(n) = Sum_{k=-inf..+inf} (4k+1)^(-n).at n=19A050970
• Numerators of Euler twin numbers Et(n).at n=20A238235
• Numerator of the rational part of the sum of reciprocals of even powers of odd numbers, i.e., Sum_{k>=1} 1/(2*k-1)^(2*n).at n=9A276592
• a(n) = (4^n*(Z(-n, 1/4) - Z(-n, 3/4)) + Z(-n, 1)*(2^(n+1)-1))*A171977(n+1), where Z(n, c) is the Hurwitz zeta function.at n=19A335955