Number of ways to tile a 4 X 3n rectangle with right trominoes.

A046984

Number of ways to tile a 4 X 3n rectangle with right trominoes.

Terms

    a(0) =1a(1) =4a(2) =18a(3) =88a(4) =468a(5) =2672a(6) =16072a(7) =100064a(8) =636368a(9) =4097984a(10) =26579488a(11) =173093760a(12) =1129796928a(13) =7383588608a(14) =48287978624a(15) =315921649152

External references