References:

  1. Inder J. Taneja, Single Digits Representations of Numbers from 1 to 20000,  https://inderjtaneja.com/2019/01/01/single-letter-representations-of-numbers-from-1-to-20000/
  2. Crazy Representations of Natural Numbers – The 10958 Problem
  3. Crazy Representations of Natural Numbers Using Factorial From 200001 to 300000
  4. Inder J. Taneja, Single Digit Representations of Natural Numbers From 1 to 5000, Zenodo, , January 14, 2019, https://doi.org/10.5281/zenodo.2538893.
  5. Inder J. Taneja, Single Digit Representations of Natural Numbers From 5001 to 10000, Zenodo, January 14, 2019, https://doi.org/10.5281/zenodo.2538897.
  6. Inder J. Taneja, Single Digit Representations of Numbers From 10001 to 15000, Zenodo, January, 26, 2019, pp. 1-510, https://doi.org/10.5281/zenodo.2550414.
  7. Inder J. Taneja, Single Digit Representations of Numbers From 15001 to 20000, Zenodo, January, 26, 2019, pp. 1-510, https://doi.org/10.5281/zenodo.2550440.
  8. Inder J. Taneja, Patterned Single Digits Representations of Natural Numbers, Zenodo, July 04, 2020, pp. 1-590, https://doi.org/10.5281/zenodo.3930382
  9. Inder J. Taneja, Single Digit Representations of Natural Numbers From 20001 to 30000, Zenodo, March 21, 2022, pp. 1-1271, https://doi.org/10.5281/zenodo.6373774.
  10. Inder J. Taneja, Single Digits Representations of Numbers from 1 to 20000,  https://inderjtaneja.com/2019/01/01/single-letter-representations-of-numbers-from-1-to-20000/