1453635domain: NAppears in sequencesNumber of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-1101-0111 pattern in any orientation.at n=13A147052Least integer k such that k/2^n > log 2.at n=21A293363The integer k that minimizes |k/2^n - log 2|.at n=21A293364