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Ranganathan, S.R. 1917. The Homographic Sequence a<sub>n+1</sub> = pa<sub>n</sub> + q/ra<sub>n</sub> + s. The Journal of the Indian Mathematical Society. 9, 3 (Jun. 1917), 109–113. DOI:https://doi.org/10.18311/jims/1917/17607.