OFFSET
0,2
COMMENTS
This is the number of possible votes of n referees judging n dancers by a mark between 0 and 8, where the referees cannot be distinguished.
a(n) is the number of n element multisets of n element multisets of a 9-set. - Andrew Howroyd, Jan 17 2020
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..50
FORMULA
a(n) = binomial(binomial(n + 8, n) + n - 1, n). - Andrew Howroyd, Jan 17 2020
PROG
(PARI) a(n)={binomial(binomial(n + 8, n) + n - 1, n)} \\ Andrew Howroyd, Jan 17 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
Sascha Kurz, Oct 11 2004
EXTENSIONS
a(0)=1 prepended and a(10) and beyond from Andrew Howroyd, Jan 17 2020
STATUS
approved