OFFSET
3,4
REFERENCES
G. S. Bloom and S. W. Golomb, Numbered complete graphs, unusual rulers, and assorted applications. Theory and Applications of Graphs, Lecture Notes in Math. 642, (1978), 53-65.
Miller, J. C. P. Difference bases. Three problems in additive number theory. Computers in number theory (Proc. Sci. Res. Council Atlas Sympos. No. 2, Oxford, 1969), pp. 299--322. Academic Press, London,1971. MR0316269 (47 #4817) - From N. J. A. Sloane, Jun 05 2012
Rhys Price Jones, Gracelessness, Proc. 10th S.-E. Conf. Combin., Graph Theory and Computing, 1979, pp. 547-552. - From N. J. A. Sloane, Jun 05 2012
LINKS
G. S. Bloom and S. W. Golomb, Applications of numbered undirected graphs, Proc. IEEE 65 (1977), 562-570.
FORMULA
n(n-1)/2 = a(n)+A004137(n). - Kellen Myers, Jun 06 2016
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Jun 05 2012
EXTENSIONS
a(26) using extension of A004137 from Hugo Pfoertner, Feb 28 2021
STATUS
approved