48807427domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of 0..5 arrays x(0..n+1) of n+2 elements without any interior element greater than both neighbors.at n=9A200883Number of nX1 0..5 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.at n=12A203050Prime numbersat n=2933636