108751domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p such that (12*p - 1, 12*p + 1) and (18*p - 1, 18*p + 1) are twin primes.at n=11A138660Number of length n words on {1,2,3} with no more than one consecutive 1 and no more than two consecutive 2's and no more than three consecutive 3's.at n=12A242452Prime numbersat n=10338