137540domain: NAppears in sequencesNumber of ways to place 2 nonattacking knights on an n X n toroidal board.at n=22A172529Number of ways to place 2 nonattacking kings on an n X n toroidal board.at n=22A179403Number of length n+4 0..1 arrays with at most one downstep in every 4 consecutive neighbor pairs.at n=15A255988