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A066400
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Smallest values of t arising in Ron Graham's sequence (A006255).
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2
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1, 3, 3, 1, 3, 3, 3, 4, 1, 4, 3, 3, 3, 5, 4, 1, 3, 3, 3, 3, 3, 3, 3, 3, 1, 4, 5, 4, 3, 3, 3, 3, 5, 4, 4, 1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 3, 5, 6, 3, 4, 5, 3, 3, 4, 3, 5, 3, 4, 5, 1, 6, 5, 3, 3, 3, 5, 3, 5, 3, 3, 6, 3, 4, 5, 3, 3, 1, 3, 3, 4, 5, 3, 3, 3, 3, 6, 6, 5, 3, 3, 5, 3, 3, 6, 7, 1, 3, 6, 3, 5, 4
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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REFERENCES
| R. L. Graham, Bijection between integers and composites, Problem 1242, Math. Mag., 60 (1980), 180.
R. L. Graham, D. E. Knuth and O. Patashnik, Concrete Mathematics. Addison-Wesley, Reading, MA, 1990, p. 147.
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EXAMPLE
| a(2) = 3 because the best such sequence is 2,3,6 which has three terms.
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CROSSREFS
| Cf. A006255, A066401.
Sequence in context: A111629 A083953 A198260 * A125562 A092040 A161200
Adjacent sequences: A066397 A066398 A066399 * A066401 A066402 A066403
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KEYWORD
| nonn,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Dec 25, 2001
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EXTENSIONS
| More terms from John W. Layman (layman(AT)math.vt.edu), Jul 14 2003
More terms from Joshua Zucker (joshua.zucker(AT)stanfordalumni.org), May 18 2006
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