901188997domain: NAppears in sequencesE.g.f. C(x) satisfies: C(x) = cosh( Integral C(x)^3 dx ).at n=6A281181E.g.f. C(x) + S(x) = exp( Integral C(x)^3 dx ) where C(x) and S(x) are described by A281181 and A281180, respectively.at n=12A281182