1,4
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).
Table of n, a(n) for n=1..13.
Sequence in context: A208986 A080091 A000602 * A047121 A182080 A259117
Adjacent sequences: A034787 A034788 A034789 * A034791 A034792 A034793
dead
N. J. A. Sloane, Feb 06 2015
approved
