79199domain: NAppears in sequencesIccanobif numbers: add reversal of a(n-1) to a(n-2).at n=22A014259Strong pseudoprimes to base 63.at n=33A020289Numbers k such that A003415(k) == A276085(k) (mod 5^5), where A003415 is the arithmetic derivative and A276085 is the primorial base log-function.at n=30A391865