A Few. The same rule applies to little which is used with singular uncountable nouns. Little a little few a few - English Grammar Today - a reference to written and spoken English grammar and usage - Cambridge Dictionary.
A few is used in the English language as a determiner while the word few is also used as an adjective noun and pronoun. It has a positive meaning. Little a little few a few - gramática inglés y uso de palabras en English Grammar Today - Cambridge University Press.
A few is used with countable nouns.
Do you want to watch a movie. A few not very many but at least more than one. Few is known as a pronoun adjective determiner as well as a noun in the English language. Without the article a few emphasizes a small number of something.
