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A005346
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Van der Waerden numbers W(2,n).
(Formerly M2819)
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13
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OFFSET
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1,2
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COMMENTS
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a(6) = W(2,6) found by researcher in SAT techniques. - Jonathan Braunhut (jonbraunhut(AT)gmail.com), Jul 29 2007
Named after the Dutch mathematician Bartel Leendert van der Waerden (1903-1996). - Amiram Eldar, Jun 24 2021
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REFERENCES
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Jacob E. Goodman and Joseph O'Rourke, editors, Handbook of Discrete and Computational Geometry, CRC Press, 1997, p. 159.
M. Lothaire, Combinatorics on Words. Addison-Wesley, Reading, MA, 1983, p. 49.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
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CROSSREFS
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KEYWORD
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nonn,hard,more
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AUTHOR
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EXTENSIONS
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a(6) from Jonathan Braunhut (jonbraunhut(AT)gmail.com), Jul 29 2007
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STATUS
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approved
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