Number of tatami tilings of a 6 X n grid (with monomers allowed).

Terms

a(0) =1a(1) =13a(2) =156a(3) =196a(4) =238a(5) =325a(6) =450a(7) =827a(8) =1404a(9) =2828a(10) =4603a(11) =7890a(12) =12475a(13) =20396a(14) =34708a(15) =57979a(16) =102658a(17) =170075a(18) =292948a(19) =482036a(20) =812571a(21) =1365010a(22) =2293755a(23) =3918292a(24) =6555468a(25) =11171195a(26) =18648162a(27) =31563547a(28) =53005132a(29) =89383740