Number of tilings of a 9 X n rectangle using straight (3 X 1) trominoes and 2 X 2 tiles.
A219973
Number of tilings of a 9 X n rectangle using straight (3 X 1) trominoes and 2 X 2 tiles.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =35a(4) =165a(5) =1177a(6) =9407a(7) =55657a(8) =372429a(9) =2766100a(10) =17671945a(11) =118674685a(12) =837152398a(13) =5531816082a(14) =37328192350a(15) =257252634864
External references
- oeis: A219973