Number of tilings of a 5 X n rectangle using dominoes and straight (3 X 1) trominoes.
A219868
Number of tilings of a 5 X n rectangle using dominoes and straight (3 X 1) trominoes.
Terms
- a(0) =1a(1) =2a(2) =15a(3) =143a(4) =1069a(5) =9612a(6) =82634a(7) =707903a(8) =6155230a(9) =53074167a(10) =458901955a(11) =3968548571a(12) =34293794622a(13) =296497719200
External references
- oeis: A219868