136043domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of ways to place 4 nonattacking bishops on a 4 X n board.at n=12A172208Successive prime factors of 10^(10^100) - 10.at n=26A200924a(1) = 2; a(n + 1) = smallest prime > a(n) such that a(n + 1) - a(n) is the product of 10 primes.at n=23A285694Prime numbersat n=12669