The last digit of $\left(\genfrac{}{}{0pt}{}{2n}{n}\right)$ and $\sum \left(\genfrac{}{}{0pt}{}{n}{i}\right)\left(\genfrac{}{}{0pt}{}{2n-2i}{n-1}\right)$.

Shur, Walter. "The last digit of and .." The Electronic Journal of Combinatorics [electronic only] 4.2 (1997): Research paper R16, 8 p.-Research paper R16, 8 p.. <http://eudml.org/doc/119228>.

@article{Shur1997,
author = {Shur, Walter},
journal = {The Electronic Journal of Combinatorics [electronic only]},
keywords = {positive integers},
language = {eng},
number = {2},
pages = {Research paper R16, 8 p.-Research paper R16, 8 p.},
publisher = {Prof. André Kündgen, Deptartment of Mathematics, California State University San Marcos, San Marcos},
title = {The last digit of and .},
url = {http://eudml.org/doc/119228},
volume = {4},
year = {1997},
}

TY - JOUR
AU - Shur, Walter
TI - The last digit of and .
JO - The Electronic Journal of Combinatorics [electronic only]
PY - 1997
PB - Prof. André Kündgen, Deptartment of Mathematics, California State University San Marcos, San Marcos
VL - 4
IS - 2
SP - Research paper R16, 8 p.
EP - Research paper R16, 8 p.
LA - eng
KW - positive integers
UR - http://eudml.org/doc/119228
ER -