Number of ways to tile a strip of length n with squares, dominoes and trominoes, using an equal number of dominoes and trominoes.

A387599

Number of ways to tile a strip of length n with squares, dominoes and trominoes, using an equal number of dominoes and trominoes.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =7a(7) =13a(8) =21a(9) =31a(10) =49a(11) =87a(12) =163a(13) =301a(14) =531a(15) =909a(16) =1557a(17) =2723a(18) =4861a(19) =8731a(20) =15589a(21) =27607a(22) =48733a(23) =86271a(24) =153531a(25) =274221a(26) =490079a(27) =874825a(28) =1560103a(29) =2782933

External references