periodic lattice component

Figure: The technique of creating a periodic lattice by using a staircase of large triangles fails when inconsistencies arise in trying to fill the space under the hypotenuses with tiles which will eventually recreate the large triangle.

Figure: T9 can be found in the downward slanting stripe ``right 9 in 5 generations'', but it is liberally surrounded by T1, T2, T3, T4 and T5's.

Figure: T9 alternates diagonals with T10 in a ``right 9 each 10 generations'' lattice. The packing also includes T1, T2, T3, T4 and T5's.

Figure: T9 can be found in a complicated de Bruijn diagram for ``left 2 in 10 generations.'' An A-polymer flotilla in a right ideal gives way to vertical stripes in which T9's and filaments of T2's and T3's can be sometimes accompanied by an additional filament of T5's. Two T5 filaments would have adequate margins but standing side by side would violate the horizontal abutment rule.