354648294000domain: NAppears in sequencesDenominators of expansion of -W_{-1}(-e^{-1-x^2/2}) where W_{-1} is Lambert W function.at n=12A005446Denominators of coefficients in C(x) where: C(x)^(1/2) - S(x)^(1/2) = 1 such that C'(x)*S(x)^(1/2) = S'(x)*C(x)^(1/2) = 2*x*C(x).at n=12A299431