Number of ways to tile a 2 X n room with 1 X 2 Tatami mats. At most 3 Tatami mats may meet at a point.

A068921

Number of ways to tile a 2 X n room with 1 X 2 Tatami mats. At most 3 Tatami mats may meet at a point.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =3a(4) =4a(5) =6a(6) =9a(7) =13a(8) =19a(9) =28a(10) =41a(11) =60a(12) =88a(13) =129a(14) =189a(15) =277a(16) =406a(17) =595a(18) =872a(19) =1278a(20) =1873a(21) =2745a(22) =4023a(23) =5896a(24) =8641a(25) =12664a(26) =18560a(27) =27201a(28) =39865a(29) =58425

External references