Talk:OEIS/Tilings
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This encoding uses uppercase and lowercase letters only. k-uniformity is encoded by chr(ord('A') - 1 + k). The possible vertex types are encoded as follows:
A: 3.3.3.3.3.3 B: 3.3.3.3.6 C: 3.3.3.4.4 D: 3.3.4.3.4 E: 3.3.4.12 F: 3.3.6.6 G: 3.4.3.12 H: 3.4.4.6 I: 3.4.6.4 J: 3.6.3.6 K: 3.12.12 L: 4.4.4.4 M: 4.6.12 N: 4.8.8 O: 6.6.6
Corresponding lowercase letters are used if the orientation of the target vertex is opposite to the orientation of the focus vertex.