Table read by downward antidiagonals: T(n,k) is the number of tilings of the n X k grid up to horizontal reflection by two tiles that are each fixed under horizontal reflection.
A368221
Table read by downward antidiagonals: T(n,k) is the number of tilings of the n X k grid up to horizontal reflection by two tiles that are each fixed under horizontal reflection.
Terms
- a(0) =2a(1) =4a(2) =3a(3) =8a(4) =10a(5) =6a(6) =16a(7) =36a(8) =40a(9) =10a(10) =32a(11) =136a(12) =288a(13) =136a(14) =20a(15) =64a(16) =528a(17) =2176a(18) =2080a(19) =544a(20) =36a(21) =128a(22) =2080a(23) =16896a(24) =32896a(25) =16640a(26) =2080a(27) =72a(28) =256a(29) =8256
External references
- oeis: A368221