200927domain: NPropertiesPrimalityPrimeyesAppears in sequencesSmaller member of a twin prime pair with a triangular sum.at n=28A086816Number of solutions to x/3 + y/4 + z/6 < n with x,y,z>=1 .at n=25A128822Primes containing the digits (2,0,0,9) in that order.at n=10A197114Prime numbersat n=18056