2,2

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

R. L. Graham and N. J. A. Sloane, On Additive Bases and Harmonious Graphs, SIAM J. Algebraic and Discrete Methods, 1 (1980), 382-404.

P. Frankl et al., Projecting a finite point-set..., Ryukyu Math. J. 8 (1995), 27-35.

R. L. Graham and N. J. A. Sloane, On Additive Bases and Harmonious Graphs

Sequence in context: A004129 A004137 A080060 this_sequence A032782 A076523 A129403

Adjacent sequences: A004128 A004129 A004130 this_sequence A004132 A004133 A004134

nonn

N. J. A. Sloane (njas(AT)research.att.com).