Number of unique Edge-magic total labelings on Path $P_n$
  Edge-magic total labeling was introduced by \cite{GS}. The number of edge-magic solutions for cycles have been explored in \cite{BS}. This sequence is mentioned in On Line Encyclopedia of Integer Sequences (OEIS) \cite{oeis}. In this short note, we enumerate the number of unique edge-magic total labelings on Path $P_n$ 
Mukkai S. Krishnamoorthy, Allen Lavoie, Ali Dasdan and Bharath Santosh
math.CO