18561024domain: NAppears in sequencesMcKay-Thompson series of class 8A for Monster.at n=21A007265McKay-Thompson series of class 8A for Monster.at n=21A045490McKay-Thompson series of class 8A for the Monster group with a(0) = 8.at n=21A131123McKay-Thompson series of class 8A for the Monster group with a(0) = 2.at n=21A134785