83946

Appears in sequences

• Number of inequivalent ways (mod D_4) a pair of checkers can be placed on an n X n board.at n=33A014409
• [ exp(11/15)*n! ].at n=7A030910
• a(n) = number of ways to dispose two pawns on a chessboard of size n X n (two dispositions are equivalent if one can be rotated or reflected to give the other one).at n=34A141582