Samuel S. Gross, Joshua Harrington. Special Numbers in the Ring Zn. J. Integer Seq., 18(11), 2015. [doi]
@article{GrossH15, title = {Special Numbers in the Ring Zn}, author = {Samuel S. Gross and Joshua Harrington}, year = {2015}, url = {https://cs.uwaterloo.ca/journals/JIS/VOL18/Harrington/harr5.html}, researchr = {https://researchr.org/publication/GrossH15}, cites = {0}, citedby = {0}, journal = {J. Integer Seq.}, volume = {18}, number = {11}, }