This is the 12183rd most frequent Russian word.
индийцев
"Индийцев" translates to "Indians," referring to people from India.
In this sentence, 'индийцев' is the genitive plural form of 'индийцы' (Indians) used to denote 'of Indians'.
Музей рассказывает о культуре индийцев.
The museum tells about the culture of Indians.
Here, 'индийцев' is used in the accusative plural form, referring to the direct objects of the verb 'met'.
Мы встретили индийцев, путешествующих по нашей стране.
We met Indians traveling through our country.
In this case, 'индийцах' is the prepositional plural form, used after the preposition 'об' (about).