OFFSET
1,2
REFERENCES
W. D. Wallis. Magic Graphs. Birkhäuser, (2001). Section 2.3.3.
LINKS
J. P. McSorley and J. A. Trono, On k-minimum and m-minimum Edge-Magic Injections of Graphs, Discrete Mathematics, Volume 310, Issue 1, 6 January 2010, Pages 56-69.
W. D. Wallis, E. T. Baskoro, M. Miller and Slamin, Edge-Magic Total Labellings, Australas. J. Comb. v.22, (2000), pp.177-190. Section 7.1.
EXAMPLE
a(3)=9 because in an edge-magic injection of the complete graph K_3 the smallest value that the largest label used can be is 6.
Then the other two labels sum to at least 1+2.
Hence the smallest that the magic sum can be is 6+1+2=9, and such an edge-magic injection of K_3 with magic sum 9 exists.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
John P. McSorley, Aug 25 2008
STATUS
approved