Sorry, I wasn't quite clear. There are two systems, both signalled by the ampersand and the final semicolon. One is a numbering system, and the other simply spells out what is required, like "andeacute;".(remember I am replacing the ampersand with an "and"). If you can't remember the number or don't have the list you can often try using the ampersand, the letter you want changed, and the usual name for it, or the first 3,4, or 5 letters of the command if it is a long word, followed by the semicolon. For instance, andatilde, andeuml (for umlauts), andiacute, andograve, anducirc (for circumflexes)......etc.
yours, Peter T.