Number of ways to tile a 3-row trapezoid of average length n with triangular and rectangular tiles, each of size 3.

A375823

Number of ways to tile a 3-row trapezoid of average length n with triangular and rectangular tiles, each of size 3.

Terms

    a(0) =0a(1) =1a(2) =3a(3) =6a(4) =16a(5) =43a(6) =107a(7) =271a(8) =695a(9) =1769a(10) =4499a(11) =11464a(12) =29202a(13) =74360a(14) =189382a(15) =482339a(16) =1228417a(17) =3128538a(18) =7967848a(19) =20292665a(20) =51681683a(21) =131623881a(22) =335222157a(23) =853749843a(24) =2174345679a(25) =5537663440a(26) =14103422412a(27) =35918853816a(28) =91478793556a(29) =232979863477

External references