Number of free poly-[3.6.3.6]-tiles (holes allowed) with n cells (division into rhombi is significant).

A197459

Number of free poly-[3.6.3.6]-tiles (holes allowed) with n cells (division into rhombi is significant).

Terms

    a(0) =1a(1) =1a(2) =3a(3) =4a(4) =12a(5) =27a(6) =78a(7) =208a(8) =635a(9) =1859a(10) =5726a(11) =17526a(12) =54620a(13) =170479a(14) =536714a(15) =1694567a(16) =5376764a(17) =17110286a(18) =54631302a(19) =174879997a(20) =561229678a(21) =1805022806a(22) =5817191196a(23) =18781911278a(24) =60744460580

External references