271657domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form 7n^2 - 6.at n=21A201852Number of nX3 0..1 arrays with every element equal to 0, 1 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=10A301879Primes congruent to 67 mod 12345.at n=3A379371Prime numbersat n=23779