OFFSET
2,6
REFERENCES
Laforest, Christian; Liestman, Arthur L.; Shermer, Thomas C.; and Sotteau, Dominique; Edge-disjoint spanners of complete bipartite graphs. Discrete Math. 234 (2001), no. 1-3, 65-76.
EXAMPLE
Triangle begins
1
1 1
1 1 2
1 1 2 2
1 2 2 2 3
1 2 2 2 3 3
1 2 2 2 3 3 4
1 2 2 2-3 3 3 4 4
...
CROSSREFS
KEYWORD
AUTHOR
N. J. A. Sloane, Feb 04 2012
STATUS
approved