2170943775domain: NAppears in sequencesDenominators in expansion of exp(2x)/(1-x).at n=17A053485Denominators of coefficients of asymptotic expansion of probability p(n) (see A002816) in powers of 1/n.at n=17A078631Denominators of coefficients c(n) in product expansion of 1 + tan x = Product_{k>=1} 1 + c(k)*x^k.at n=16A353584