Number of ways to place n nonattacking composite pieces queen + rider[3,5] on an n X n chessboard.
A189880
Number of ways to place n nonattacking composite pieces queen + rider[3,5] on an n X n chessboard.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =2a(4) =10a(5) =0a(6) =8a(7) =24a(8) =72a(9) =116a(10) =336a(11) =1124a(12) =4056a(13) =12628a(14) =58984a(15) =263066a(16) =1124116a(17) =5388972a(18) =29219680a(19) =173696136a(20) =967249940
External references
- oeis: A189880