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A006638 Restricted postage stamp problem.
(Formerly M1088)
1
2, 4, 8, 12, 16, 20, 26, 32, 40, 44, 54, 64 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

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

S. S. Wagstaff, Jr., Additive h-bases for n, pp. 302-327 of Number Theory Carbondale 1979, Lect. Notes Math. 751 (1982).

LINKS

Table of n, a(n) for n=1..12.

CROSSREFS

Cf. A001212.

Sequence in context: A160408 A221707 A186146 * A001212 A160742 A160736

Adjacent sequences:  A006635 A006636 A006637 * A006639 A006640 A006641

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified April 20 10:00 EDT 2014. Contains 240779 sequences.