OFFSET
1
COMMENTS
It is assumed that the dart scores.
LINKS
Wikipedia, Darts
EXAMPLE
a(1) = 1 because the only possible throw is 1.
a(23) = 0 because it is not possible to get a score of 23.
CROSSREFS
KEYWORD
nonn,fini,full
AUTHOR
Colin Barker, May 21 2014
STATUS
approved