276991311872domain: 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=16A012997cosh(arctan(x)+tan(x))=1+4/2!*x^2+16/4!*x^4+544/6!*x^6+11008/8!*x^8...at n=8A013006