96223domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumbers whose base-b expansions, for both b=3 and b=4, include no digits other than 1 and b-1.at n=26A262958Number of ways to select 4 numbers from the set of the first n natural numbers avoiding 3-term arithmetic progressions.at n=38A300760Prime numbersat n=9270