92981domain: NAppears in sequencesExpansion of e.g.f.: cosh(tan(x)+log(x+1))=1+4/2!*x^2-6/3!*x^3+51/4!*x^4-180/5!*x^5...at n=8A012933Numbers k such that the smoothly undulating palindromic number (94*10^k - 49)/99 is a prime.at n=5A062229