Manasara 55.19

55.19

athavā tena mānena ṣoḍaśāṃśaṃ vibhājite
ekaikāṃśakaṃ tasmātpañcaviṃśāṃśakāntakam

Or alternatively, when divided into sixteen parts by that measure, / [increasing] part by part from that up to twenty-five parts,