Number of ways of placing n nonattacking (normal) queens on n X n board; solutions congruent on the torus count only once.
A062164
Number of ways of placing n nonattacking (normal) queens on n X n board; solutions congruent on the torus count only once.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =1a(4) =1a(5) =1a(6) =3a(7) =6a(8) =20a(9) =40a(10) =191a(11) =953a(12) =4604a(13) =24660a(14) =158466a(15) =1009395
External references
- oeis: A062164