Eight white queens and one red queen on a 3 X 3 chessboard. G.f.: (1 - 2*x)/(1 - 5*x - 3*x^2).
A180036
Eight white queens and one red queen on a 3 X 3 chessboard. G.f.: (1 - 2*x)/(1 - 5*x - 3*x^2).
Terms
- a(0) =1a(1) =3a(2) =18a(3) =99a(4) =549a(5) =3042a(6) =16857a(7) =93411a(8) =517626a(9) =2868363a(10) =15894693a(11) =88078554a(12) =488076849a(13) =2704619907a(14) =14987330082a(15) =83050510131a(16) =460214540901
External references
- oeis: A180036