Number of ways to place n nonattacking composite pieces queen + leaper[1,5] on an n X n chessboard.
A189866
Number of ways to place n nonattacking composite pieces queen + leaper[1,5] on an n X n chessboard.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =2a(4) =10a(5) =0a(6) =0a(7) =0a(8) =40a(9) =52a(10) =160a(11) =500a(12) =2656a(13) =11540a(14) =67776a(15) =415716a(16) =2610520a(17) =17450592a(18) =124903880a(19) =944965832a(20) =7292031780
External references
- oeis: A189866