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A217005 Van der Waerden numbers w(j+2; t_0,t_1,...,t_{j-1}, 3, 3) with t_0 = t_1 = ... = t_{j-1} = 2. 7
9, 14, 17, 20, 21, 24, 25, 28, 31, 33, 35, 37, 39, 42, 44, 46, 48, 50, 51 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
REFERENCES
T. C. Brown, Some new van der Waerden numbers (preliminary report), Notices American Math. Society, 21 (1974), A-432.
V. Chvatal, Some unknown van der Waerden numbers, Combinatorial Structures and their Applications (R. Guy et al., eds.), Gordon and Breach, New York, 1970.
LINKS
T. Ahmed, Some more Van der Waerden numbers, J. Int. Seq. 16 (2013) 13.4.4
B. Landman, A. Robertson, and C. Culver, Some new exact van der Waerden numbers, Integers, 5(2) (2005), A10.
EXAMPLE
w(2;3,3)=9, w(3;2,3,3)=14, w(4;2,2,3,3)=17, and so on...
CROSSREFS
Sequence in context: A180868 A036266 A087722 * A103409 A011767 A305092
KEYWORD
nonn,more,hard
AUTHOR
Tanbir Ahmed, Sep 22 2012
EXTENSIONS
a(17)=50 and a(18)=51 added by Tanbir Ahmed, Dec 07 2012
STATUS
approved

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Last modified July 22 12:22 EDT 2024. Contains 374499 sequences. (Running on oeis4.)