Number of tilings of a 4 X n rectangle using dominoes and straight (3 X 1) trominoes.
A219862
Number of tilings of a 4 X n rectangle using dominoes and straight (3 X 1) trominoes.
Terms
- a(0) =1a(1) =1a(2) =7a(3) =41a(4) =184a(5) =1069a(6) =5624a(7) =29907a(8) =161800a(9) =862953a(10) =4631107a(11) =24832532a(12) =133028028a(13) =713283085a(14) =3822965706a(15) =20491221900a(16) =109840081931a(17) =588746006676
External references
- oeis: A219862