| a(4)=1 because when forming an edge-magic injection of K_4 we must use at
least the first 10 natural numbers {1,2,...,10} since K_4 has a total of
10 vertices and edges. However this is not possible. But there is an
edge-magic injection of K_4 using the set {1,2,...,11}\{4}, with largest label 11.
Hence the magic deficiency of K_4 is a(4)=11-10=1.
| 