

A004132


Modular postage stamp problem.
(Formerly M2450)


1



3, 5, 9, 13, 19, 21, 30, 35, 43, 51, 63, 67
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OFFSET

2,1


REFERENCES

H. Haanpaa, Minimum sum and difference covers of abelian groups. J. Integer Seq. 7 (2004), no. 2, Article 04.2.6, 10 pp.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).


LINKS

Table of n, a(n) for n=2..13.
Bela Bajnok, Additive Combinatorics: A Menu of Research Problems, arXiv:1705.07444 [math.NT], May 2017. See p. 136.
R. L. Graham and N. J. A. Sloane, On Additive Bases and Harmonious Graphs
R. L. Graham and N. J. A. Sloane, On Additive Bases and Harmonious Graphs, SIAM J. Algebraic and Discrete Methods, 1 (1980), 382404.
Sean A. Irvine, Example sets for a(2) to a(10)


CROSSREFS

Sequence in context: A215909 A078735 A212530 * A207187 A065802 A245302
Adjacent sequences: A004129 A004130 A004131 * A004133 A004134 A004135


KEYWORD

nonn,more


AUTHOR

N. J. A. Sloane


EXTENSIONS

a(10) from Sean A. Irvine, Dec 07 2015


STATUS

approved



