On Diophantine Equations Related to Narayana’s Cows Sequence and Double Factorials or Repdigits

oleh: Yanjiao Ji, Peng Yang, Tianxin Cai

Format: Article
Diterbitkan: MDPI AG 2022-09-01

Deskripsi

In this paper, we determine all the Narayana’s cows numbers that are factorials or double factorials. We also show that 88 is the only repdigit (i.e., a class of numbers that has reflectional symmetry across a vertical axis) that can be written as the product of consecutive Narayana’s cows numbers.