References: Inder J. Taneja, 2020 In Numbers: Mathematical Style – Revised,  Zenodo, December 31, 2019, pp. 1-37,  http://doi.org/10.5281/zenodo.3596193;  https://inderjtaneja.com/2020/01/02/2020-in-numbers-mathematical-style/ Inder J. Taneja, Power-Type Semi-Selfie Numbers and Patterns, Zenodo, July 16, 2019, pp. 1-130, http://doi.org/10.5281/zenodo.3338366. Inder J. Taneja, Amicable Numbers With Patterns in Products and Powers, Zenodo, March 05, 2019, pp. 1-25, http://doi.org/10.5281/zenodo.2583306. Inder J. Taneja, Single … Continue reading 27th and 28th Days of Year: 27.01.20 and 28.01.20