408787domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes from A122136 corresponding to the indices A122138.at n=26A122139Number of nX3 0..1 arrays with every element unequal to 0, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.at n=13A304671Prime numbersat n=34517