125284domain: NAppears in sequencesMcKay-Thompson series of class 18d for the Monster group.at n=27A058539Number of Fermat pseudoprimes to bases 2 and 3 less than 10^n.at n=13A114246Number of permutations in S_n avoiding {bar 4}1253 (i.e., every occurrence of 1253 is contained in an occurrence of a 41253).at n=9A137540