Number of ways to arrange 5 nonattacking knights on the lower triangle of an n X n board.
A194489
Number of ways to arrange 5 nonattacking knights on the lower triangle of an n X n board.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =13a(4) =387a(5) =3727a(6) =23496a(7) =111433a(8) =429343a(9) =1407755a(10) =4061432a(11) =10561723a(12) =25208796a(13) =55996244a(14) =117021864a(15) =232070481a(16) =439779278a(17) =800893832a(18) =1408234986a(19) =2400123737a(20) =3978154435a(21) =6430366713a(22) =10161044648a(23) =15728568633a(24) =23892962265a(25) =35675014169
External references
- oeis: A194489