Number of ways to place 4 nonattacking knights on an n X n toroidal board.

A172531

Number of ways to place 4 nonattacking knights on an n X n toroidal board.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =228a(4) =600a(5) =12357a(6) =68796a(7) =275888a(8) =872532a(9) =2344025a(10) =5580762a(11) =12107196a(12) =24392446a(13) =46261537a(14) =83426400a(15) =144157632a(16) =240119696a(17) =387393921a(18) =607715342a(19) =929951100

External references