$k$-Pell-Lucas numbers as Product of Two Repdigits

Bibhu Prasad Tripathy, Bijan Kumar Patel

For any integer $k\ge 2$, let $\{Q_n^{(k)}{\}}_{n\ge -(k-2)}$ denote the $k$-generalized Pell-Lucas sequence which starts with $0,\dots ,2,2$($k$ terms) where each next term…