Rosa, A. On certain valuations of the vertices of a graph. (English) Zbl 0193.53204 Theory Graphs, Int. Symp. Rome 1966, 349-355 (1967). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 28 ReviewsCited in 64 Documents Keywords:topology PDF BibTeX XML Online Encyclopedia of Integer Sequences: Number of fundamentally different rainbow graceful labelings of graphs with n edges.