Alvy Ray Smith. Infinite Regular Hexagon Sequences on a Triangle. Experimental Mathematics, 9(3):397-406, 2000. [doi]
@article{Smith00-11, title = {Infinite Regular Hexagon Sequences on a Triangle}, author = {Alvy Ray Smith}, year = {2000}, doi = {10.1080/10586458.2000.10504416}, url = {http://dx.doi.org/10.1080/10586458.2000.10504416}, researchr = {https://researchr.org/publication/Smith00-11}, cites = {0}, citedby = {0}, journal = {Experimental Mathematics}, volume = {9}, number = {3}, pages = {397-406}, }