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A217008 Van der Waerden numbers w(j+3; t_0,t_1,...,t_{j-1}, 3, 3, 3) with t_0 = t_1 = ... = t_{j-1} = 2. 7
27, 40, 41, 42, 45, 49, 52 (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

Table of n, a(n) for n=0..6.

T. Ahmed, Some new van der Waerden numbers and some van der Waerden-type numbers, Integers, 9 (2009), A06, 65-76.

B. Landman, A. Robertson, and C. Culver, Some new exact van der Waerden numbers, Integers, 5(2) (2005), A10.

EXAMPLE

w(3;3,3,3)=27, w(4;2,3,3,3)=40, w(5;2,2,3,3,3)=41, and so on...

CROSSREFS

Cf. A217005, A217007, A217058, A217059, A217060, A217236, A217237.

Sequence in context: A039614 A181489 A117103 * A124940 A272829 A114446

Adjacent sequences:  A217005 A217006 A217007 * A217009 A217010 A217011

KEYWORD

nonn,more,hard

AUTHOR

Tanbir Ahmed, Sep 23 2012

EXTENSIONS

a(6)=52 added by Tanbir Ahmed, Dec 07 2012

STATUS

approved

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Last modified September 26 15:27 EDT 2017. Contains 292531 sequences.