531103domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of arrangements of n+2 numbers in 0..2 with each number being the sum mod 3 of two others.at n=9A183877Number of arrangements of n+3 numbers in 0..2 with each number being the sum mod 3 of three others.at n=8A183885Prime numbersat n=43912