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A007784
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Van der Waerden numbers W(4,n).
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2
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OFFSET
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1,1
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REFERENCES
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Knuth, Donald E., Satisfiability, Fascicle 6, volume 4 of The Art of Computer Programming. Addison-Wesley, 2015, page 5.
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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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Matthew Klimesh (matthew(AT)engin.umich.edu)
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EXTENSIONS
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Definition and offset changed and a(9) added (from Knuth) by N. J. A. Sloane, May 13 2018
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STATUS
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approved
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