Number of ways to place 5 nonattacking queens on a 5 X n board.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =10a(6) =40a(7) =164a(8) =568a(9) =1614a(10) =3916a(11) =8492a(12) =16852a(13) =31100a(14) =54068a(15) =89428a(16) =141812a(17) =216932a(18) =321700a(19) =464348a(20) =654548a(21) =903532a(22) =1224212a(23) =1631300a(24) =2141428a(25) =2773268a(26) =3547652a(27) =4487692a(28) =5618900a(29) =6969308