95417domain: NAppears in sequencesThe number of distinct positions on an infinite chessboard reachable by the (3,4)-leaper in <= n moves.at n=40A297741Number of nX3 0..1 arrays with every element equal to 0, 1 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=15A302158