Eight white kings and one red king on a 3 X 3 chessboard. G.f.: (1 + 3*x - 2*x^2)/(1 - 2*x - 9*x^2 - 2*x^3).
A179605
Eight white kings and one red king on a 3 X 3 chessboard. G.f.: (1 + 3*x - 2*x^2)/(1 - 2*x - 9*x^2 - 2*x^3).
Terms
- a(0) =1a(1) =5a(2) =17a(3) =81a(4) =325a(5) =1413a(6) =5913a(7) =25193a(8) =106429a(9) =451421a(10) =1911089a(11) =8097825a(12) =34298293a(13) =145299189a(14) =615478665a(15) =2607246617a(16) =11044399597a(17) =46784976077a(18) =198184041761a(19) =839521667409
External references
- oeis: A179605