%I
%S 1,2,3,6,11,19,28,42,56
%N Related to study of weak Sidon sets.
%D Bela Bajnok, Additive Combinatorics: A Menu of Research Problems, Manuscript, May 2017. See Problem C.62.
%D A. Maturo and D. YagerElorriaga, Finding Sidon sets in abelian groups. Research Papers in Mathematics, B. Bajnok, ed., Gettysburg College, Vol. 7 (2008).
%H Bela Bajnok, <a href="https://arxiv.org/abs/1705.07444">Additive Combinatorics: A Menu of Research Problems</a>, arXiv:1705.07444 [math.NT], May 2017. See Problem C.62.
%Y Cf. A004135.
%K nonn,more
%O 1,2
%A _N. J. A. Sloane_, Jul 06 2017
