Eight white kings and one red king on a 3 X 3 chessboard. G.f.: (1 + 2*x)/(1 - 3*x - 7*x^2).
A179602
Eight white kings and one red king on a 3 X 3 chessboard. G.f.: (1 + 2*x)/(1 - 3*x - 7*x^2).
Terms
- a(0) =1a(1) =5a(2) =22a(3) =101a(4) =457a(5) =2078a(6) =9433a(7) =42845a(8) =194566a(9) =883613a(10) =4012801a(11) =18223694a(12) =82760689a(13) =375847925a(14) =1706868598a(15) =7751541269a(16) =35202703993a(17) =159868900862a(18) =726025630537
External references
- oeis: A179602