Eight white queens and one red queen on a 3 X 3 chessboard. G.f.: (1 + 3*x)/(1 - 6*x - 3*x^2).
A180028
Eight white queens and one red queen on a 3 X 3 chessboard. G.f.: (1 + 3*x)/(1 - 6*x - 3*x^2).
Terms
- a(0) =1a(1) =9a(2) =57a(3) =369a(4) =2385a(5) =15417a(6) =99657a(7) =644193a(8) =4164129a(9) =26917353a(10) =173996505a(11) =1124731089a(12) =7270376049a(13) =46996449561a(14) =303789825513
External references
- oeis: A180028