Numerator of c(n) = 2^(2n)(2^(2n) - 1)/(2n)!, a coefficient used in the expansion of tan(x) as Sum_{n>=1} c(n)|Bernoulli(2n)|x^(2n-1).

A225845

Numerator of c(n) = 2^(2*n)*(2^(2*n) - 1)/(2*n)!, a coefficient used in the expansion of tan(x) as Sum_{n>=1} c(n)*|Bernoulli(2*n)|*x^(2*n-1).