How many Mahajanapadas did the early Buddhist and Jaina texts mention?

NCERT (2026-27): “2.1 The sixteen mahajanapadas … The sixth century BCE is often regarded as a major turning point in early Indian history. It is an era associated with early states, cities, the growing use of iron, the development of coinage, etc. It also witnessed the growth of diverse systems of thought, including Buddhism and Jainism. Early Buddhist and Jaina texts (see also Chapter 4) mention, amongst other things, sixteen states known as mahajanapadas. Although the lists vary, some names such as Vajji, Magadha, Koshala, Kuru, Panchala, Gandhara and Avanti occur frequently. Clearly, these were amongst the most important mahajanapadas.…”