Number of ways to place 5 nonattacking amazons (superqueens) on an n X n board.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =248a(7) =7320a(8) =82758a(9) =562384a(10) =2756122a(11) =10771928a(12) =35504296a(13) =102677536a(14) =267284836a(15) =638673432a(16) =1420555842a(17) =2974232240a(18) =5911536526a(19) =11232560320a(20) =20516606128a(21) =36191817440a(22) =61893239340a(23) =102950022616a(24) =167010533830a(25) =264869097472a(26) =411497661102a(27) =627378473416a(28) =940130628920