18243225

Appears in sequences

• a(n) = (n+1)*(2*n)!/(2^n*n!) = (n+1)*(2n-1)!!.at n=8A001193
• Denominators of zeta(2*n)/Pi^(2*n).at n=7A002432
• Expansion of e.g.f. theta_3^(15/2).at n=7A015673
• Denominators in Taylor series for cot x.at n=7A036278
• Denominators of coefficients in expansion of x^2*(1-exp(-2*x))^(-2).at n=15A104007
• Denominator of s_{2n}, where s_0 = 1/2, s_n = | 2^n*(2^(n-1)-1)*Bernoulli(n)/n! | for n>0.at n=7A171079
• Denominators of an approximation to zeta(n)/Pi^n.at n=13A340471