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Search: id:A100042
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| 8, 24, 160, 896, 22528, 106496, 2228224, 9961472, 192937984, 15569256448, 66571993088, 5085241278464, 90159953477632, 378231999954944, 6614661952700416, 477381560501272576, 34011184385901985792
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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A lower bound for the 2-color van der Waerden number A005346(prime(n)); see Berlekamp reference. - Charles R Greathouse IV Jul 13 2008
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REFERENCES
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E. R. Berlekamp, "A construction for partitions which avoid long arithmetic progressions", Canadian Mathematical Bulletin 11 (1968), pp. 409-414.
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LINKS
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Charles R Greathouse IV, Home Page [in lieu of email address]
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MAPLE
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seq(ithprime(n)*2^ithprime(n), n=1..20);
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CROSSREFS
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Sequence in context: A010566 A092771 A098070 this_sequence A061027 A052656 A094061
Adjacent sequences: A100039 A100040 A100041 this_sequence A100043 A100044 A100045
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KEYWORD
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nonn
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AUTHOR
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Jorge Coveiro (jorgecoveiro(AT)yahoo.com), Dec 26 2004
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