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Search: id:A005048
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| A005048 |
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Minimal span of set of n elements with no 4-term A.P. |
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+0
1
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| 4, 5, 7, 8, 9, 12, 14, 16, 18, 20, 22, 24, 26, 27, 29, 32, 33, 36
(list; graph; listen)
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OFFSET
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4,1
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REFERENCES
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B. E. Brown and D. M. Gordon, On sequences without geometric progressions, Math. Comp., 65 (1996), 1749-1754.
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EXAMPLE
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Example for n=13: { 1, 2, 3, 5, 6, 8, 9, 10, 16, 17, 18, 20, 21 } with span 20.
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CROSSREFS
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Sequence in context: A010666 A047494 A080712 this_sequence A119642 A097482 A032728
Adjacent sequences: A005045 A005046 A005047 this_sequence A005049 A005050 A005051
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KEYWORD
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nonn
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AUTHOR
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njas
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EXTENSIONS
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Corrected and extended by David W. Wilson (davidwwilson(AT)comcast.net) May 15 1997
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