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A005346 Van der Waerden numbers.
(Formerly M2819)
7
1, 3, 9, 35, 178, 1132 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

Extension (2,6) found by researcher in SAT techniques. - Jonathan Braunhut (jonbraunhut(AT)gmail.com), Jul 29 2007

REFERENCES

J. E. Goodman and J. 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).

LINKS

Eric Weisstein's World of Mathematics, vander Waerden Number

University of Cincinnati, Phd Student finds value for van der Waerden number

P. R. Herwig, M. J. H. Heule, P. M. van Lambalgen, H. van Maaren, A new method to construct lower bounds for Van de Waerden Numbers, Elec. J. Combinat. 14 (1) (2007), #R6.

CROSSREFS

Cf. A121894.

Sequence in context: A107894 A155858 A000834 * A129094 A059424 A002575

Adjacent sequences:  A005343 A005344 A005345 * A005347 A005348 A005349

KEYWORD

nonn,hard

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

EXTENSIONS

a(6) from Jonathan Braunhut (jonbraunhut(AT)gmail.com), Jul 29 2007

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Last modified February 16 06:41 EST 2012. Contains 205862 sequences.