222529domain: NAppears in sequencesStrong pseudoprimes to base 13.at n=29A020239Strong pseudoprimes to base 22.at n=33A020248Number of free n-ominoes with cell centers determining n-2 space (proper dimension n-2).at n=11A036364Product of twin-prime-indexed primes and their upper bound twin prime.at n=13A080699