170663275520domain: NAppears in sequencesExpansion of e.g.f.: exp(arctan(x)+tan(x))=1+2*x+4/2!*x^2+8/3!*x^3+16/4!*x^4+72/5!*x^5...at n=15A012997sinh(arctan(x)+tan(x))=2*x+8/3!*x^3+72/5!*x^5+3040/7!*x^7...at n=7A013002