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A004129 Number of solutions to postage stamp problem.
(Formerly M2525)
0
1, 3, 6, 9, 13, 17, 22, 27, 33, 40, 47, 56, 65, 74, 83, 94, 105 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

REFERENCES

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..18.

R. L. Graham and N. J. A. Sloane, On Additive Bases and Harmonious Graphs, SIAM J. Algebraic and Discrete Methods, 1 (1980), 382-404, doi:10.1137/0601045.

Simon Plouffe, Approximations de séries génératrices et quelques conjectures, Dissertation, Université du Québec à Montréal, 1992.

Simon Plouffe, 1031 Generating Functions and Conjectures, Université du Québec à Montréal, 1992.

FORMULA

The g.f. (z^4+z^3+2*z^2+2*z+1)*(z^2+z+1)/(z-1)/(z^5+z^4+z^3-z-1) conjectured by Simon Plouffe in his 1992 dissertation is false. - Sean A. Irvine, Nov 21 2015

CROSSREFS

Sequence in context: A025205 A024190 A004116 * A219646 A185173 A171662

Adjacent sequences:  A004126 A004127 A004128 * A004130 A004131 A004132

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane

EXTENSIONS

a(15)-a(18) from Sean A. Irvine, Nov 21 2015

STATUS

approved

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Last modified September 17 22:53 EDT 2019. Contains 327147 sequences. (Running on oeis4.)