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A171082
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Van der Waerden numbers w(2;4,n).
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3
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OFFSET
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4,1
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LINKS
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Table of n, a(n) for n=4..9.
Tanbir Ahmed, Van der Waerden numbers
Tanbir Ahmed, On computation of exact van der Waerden numbers, Integers: Electronic Journal of Combinatorial Number Theory, 11 (2011), A71.
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CROSSREFS
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Cf. A005346, A171081, A217235.
Sequence in context: A039312 A043915 A318572 * A121707 A267999 A319386
Adjacent sequences: A171079 A171080 A171081 * A171083 A171084 A171085
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KEYWORD
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nonn,hard,more
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AUTHOR
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N. J. A. Sloane, based on an email from Tanbir Ahmed, Sep 07 2010 and Feb 22 2012
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STATUS
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approved
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