Eight white kings and one red king on a 3 X 3 chessboard. G.f.: (1+2*x)/(1 - 2*x - 8*x^2 - 4*x^3).
A179611
Eight white kings and one red king on a 3 X 3 chessboard. G.f.: (1+2*x)/(1 - 2*x - 8*x^2 - 4*x^3).
Terms
- a(0) =1a(1) =4a(2) =16a(3) =68a(4) =280a(5) =1168a(6) =4848a(7) =20160a(8) =83776a(9) =348224a(10) =1447296a(11) =6015488a(12) =25002240a(13) =103917568a(14) =431915008a(15) =1795179520a(16) =7461349376a(17) =31011794944a(18) =128895102976a(19) =535729963008
External references
- oeis: A179611