The Last Digit of (2n choose n) and Sigma(n choose i)(2n-2i choose n-i)

Walter Shur. The Last Digit of (2n choose n) and Sigma(n choose i)(2n-2i choose n-i). Electr. J. Comb., 4(2), 1997. [doi]

@article{Shur97,
  title = {The Last Digit of (2n choose n) and Sigma(n choose i)(2n-2i choose n-i)},
  author = {Walter Shur},
  year = {1997},
  url = {http://www.combinatorics.org/Volume_4/Abstracts/v4i2r16ab.html},
  researchr = {https://researchr.org/publication/Shur97},
  cites = {0},
  citedby = {0},
  journal = {Electr. J. Comb.},
  volume = {4},
  number = {2},
}