906707domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of (n+2) X 3 binary arrays avoiding patterns 000 and 101 in rows, columns and nw-to-se diagonals.at n=12A202525Primes p such that p - d and p + d are also primes, where d is the smallest nonzero digit of p.at n=25A245878Prime numbersat n=71762