Number of one-sided poly-[4.6.12]-tiles (holes allowed) with n cells (division into triangles is significant).

A197463

Number of one-sided poly-[4.6.12]-tiles (holes allowed) with n cells (division into triangles is significant).

Terms

    a(0) =2a(1) =3a(2) =6a(3) =13a(4) =28a(5) =66a(6) =148a(7) =349a(8) =828a(9) =2005a(10) =4880a(11) =12043a(12) =29852a(13) =74645a(14) =187498a(15) =473448a(16) =1199630a(17) =3050554a(18) =7778234a(19) =19885465a(20) =50950796a(21) =130824763a(22) =336555890a(23) =867389312a(24) =2239220294a(25) =5789804688

External references