487073domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of 2-divided words of length n over a 3-letter alphabet.at n=11A210323Primes of the form x^2 + y^2 with x > y such that x^2 - y^2 is a square and x^4 + y^4 is a prime.at n=15A282867Prime numbersat n=40534