> Although it is not quite on tantra, there is a highly interesting
> article in modern Sanskrit on the relationship between Sanskrit
> analysis of poetic metre and Pascal's triangle. I do not have the
> full reference available in my present location, but it may be found
> in the introduction to the late Michael Hahn's edition of the
> ChandoratnAkara

The reference is found on p. 5 f. of Hahn's introduction:

Naya Raj Pant: Pyāskalena svopajñam iti prakhyāpitam pāṭīgaṇitatribhujaṃ Vṛttaratnākaroktaikadvyādilagakriyaiva (“The arithmetical triangle, claimed to be his own discovery by Pascal, is nothing but the Ekadvyādilagakriyā as told in the Vṛttaratnākara”), published in the first volume of Jayatu Saṃskṛtam, 1:4 Vikramasaṃvat 2017 (1960), pp. 1-8, Kathmandu.

Best,
Roland Steiner