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A157245
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Decimal expansion of estimate of 1 - (the weakly triple-free set constant).
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1
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1, 9, 9, 6, 8, 0, 5, 1, 6, 1, 9, 7
(list; constant; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| This is the asymptotic density of minimal sets in {1,..,n} hitting every set {x,2x,3x}, as n approaches infinity.
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LINKS
| S. R. Finch, Triple-Free Sets of Integers
F. R. K. Chung, P. Erdos and R. L. Graham, On Sparse Sets Hitting Linear Forms, Number Theory for the Millennium, v. 1, Proc. 2000 Urbana conf., A. K. Peters, 2002, pp. 257-272.
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EXAMPLE
| 0.199680516197 = 1 - 0.800319483802...
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CROSSREFS
| Cf. A157244.
Sequence in context: A146487 A195790 A085984 * A072908 A197390 A201570
Adjacent sequences: A157242 A157243 A157244 * A157246 A157247 A157248
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KEYWORD
| cons,more,nonn
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AUTHOR
| S. R. Finch (Steven.Finch(AT)inria.fr), Feb 25 2009
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