@article{Knuth06,
  title = {Problem 11243},
  author = {Donald E. Knuth},
  year = {2006},
  url = {http://www.jstor.org/stable/27642039},
  researchr = {https://researchr.org/publication/Knuth06},
  cites = {0},
  citedby = {0},
  journal = {The American Mathematical Monthly},
  volume = {113},
  number = {8},
  pages = {759},
}