In the first chapter of Abhidhammattha Sangho by Anurudha Thera , the
citta summary is as below :

"Ekadasavidham tsama - pathamadikam'iritam

Jhanam'ekekam ante tu -tevisatividham bhave "

translated by Narada Thera as

" Thus the Jhanas begining from the first amount to eleven, they say.
The last Jhana(i.e. the fifth) totals twenty-three"

Please explain how we arrive at the above mentioned number of Jhanas and
which are they?

Metta,

Dr. Yojana