# How do you read "$a_n$" in English?

What is the correct way to read "$a_n$" in English? What is the translation of what in Spanish is "$a$ sub $n$"?

• My friend Rik tells the story of the time his aunt was visiting from Germany and asked him “Rik, what is the word, in English, for when you are happy because someone else is sad?”
– MJD
Jul 31, 2013 at 3:38
• When there is no possible confusion with $a^{(n)}$, I often just say a n. Jun 14, 2016 at 10:50

Believe it or not, the usual way is ‘$a$ sub $n$’.