What's the HTML character entity for the # sign? I've looked around for "pound" (which keeps returning the currency), and "hash" and "number", but what I try doesn't seem to turn into the right character.
You can search it on the individual character at fileformat.info. Enter # as search string and the 1st hit will lead you to U+0023. Scroll a bit down to the 2nd table, Encodings, you'll see under each the following entries:
HTML Entity (decimal) # HTML Entity (hex) #