138928domain: NAppears in sequencesHarary index of the n X n black bishop graph.at n=37A296198Harary index of the n X n white bishop graph.at n=36A296200Number of n X 4 0..1 arrays with every element equal to 2, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.at n=12A298926