[EM] #ballots with both truncation and equalities allowed - correction

[Warren Smith]

so incorporating the correction, and I just re-estimated C this time better,
the exponential generating function is
   exp(+x) / (2 - exp(x))
and the asymptotics for large N are   C*N!/(ln2)^N   for some constant  
C = 1.44  approximately.
wds