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Let  k  ≥ 2. A generalization of the well-known Pell sequence is the  k -Pell sequence whose first  k  terms are 0,…, 0, 1 and each term afterwards is given by the linear recurrencep  n    (  k  )=  2   P   n  −  1(  k  )+   P   n  −  2(  k  )+  ⋯  +   P   n  −  k(  k  ).

On Repdigits Which are Sums or Differences of Two k -Pell Numbers