Table read by downward antidiagonals: T(n,k) is the number of tilings of the n X k torus up to horizontal reflections by two tiles that are both fixed under horizontal reflection.

A368305

Table read by downward antidiagonals: T(n,k) is the number of tilings of the n X k torus up to horizontal reflections by two tiles that are both fixed under horizontal reflection.

Terms

    a(0) =2a(1) =3a(2) =3a(3) =4a(4) =7a(5) =4a(6) =6a(7) =14a(8) =13a(9) =6a(10) =8a(11) =40a(12) =44a(13) =34a(14) =8a(15) =14a(16) =108a(17) =218a(18) =226a(19) =78a(20) =13a(21) =20a(22) =362a(23) =1200a(24) =2386a(25) =1184a(26) =237a(27) =18a(28) =36a(29) =1182

External references