870983domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1110-0111-0001 pattern in any orientation.at n=15A147398Primes of the form floor(p^3/8), where p is any prime number.at n=4A163430Prime numbersat n=69173