64322domain: NAppears in sequencesNumber of ways to place a non-attacking white and black pawn on n X n chessboard.at n=16A035290Divide primes in groups with 2n elements and add together.at n=17A109726Number of North-East paths from (0,0) to (n,n) that have odd number of times bounce off y = x to the right.at n=8A268431