5187181domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of nX2 0..3 arrays with every nonzero element less than or equal to some NW, E or S neighbor.at n=7A203391T(n,k)=Number of nXk 0..3 arrays with every nonzero element less than or equal to some NW, E or S neighbor.at n=37A203397Prime numbersat n=360584