Eight white kings and one red king on a 3 X 3 chessboard. G.f.: (1+4*x)/(1 - 2*x - 10*x^2 - 4*x^3).
A179601
Eight white kings and one red king on a 3 X 3 chessboard. G.f.: (1+4*x)/(1 - 2*x - 10*x^2 - 4*x^3).
Terms
- a(0) =1a(1) =6a(2) =22a(3) =108a(4) =460a(5) =2088a(6) =9208a(7) =41136a(8) =182704a(9) =813600a(10) =3618784a(11) =16104384a(12) =71651008a(13) =318820992a(14) =1418569600a(15) =6311953152a(16) =28084886272a(17) =124963582464a(18) =556023840256
External references
- oeis: A179601