OFFSET
1,4
REFERENCES
R. G. Busacker and T. L. Saaty, Finite Graphs and Networks, McGraw-Hill, NY, 1965, p. 201.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
CROSSREFS
KEYWORD
dead
AUTHOR
N. J. A. Sloane, Feb 06 2015
STATUS
approved