  Improving a 2003 result of Bohman and Holzman, we show that for $n \geq 1$,
the Shannon capacity of the complement of the $2n+1$-cycle is at least
$(2^{r_n} + 1)^{1/r_n} = 2 + \Omega(2^{-r_n}/r_n)$, where $r_n = \exp(O((\log
n)^2))$ is the number of partitions of $2(n-1)$ into powers of $2$. We also
discuss a connection between this result and work by Day and Johnson in the
context of graph Ramsey numbers.
