200023domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumbers that require three steps to collapse to a single digit in base 4 (written in base 4).at n=26A253953Primes having only {0, 2, 3} as digits.at n=32A260125Primes containing 000 as a substring.at n=25A386247Prime numbersat n=17988