A217235 Van der Waerden numbers w(3; 3, 3, n).

27, 51, 80, 107

Offset

3,1

References

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=3..6.

Tanbir Ahmed, On computation of exact van der Waerden numbers, Integers: Electronic Journal of Combinatorial Number Theory, 11 (2011), A71.

M. D. Beeler and P. E. O'Neil, Some new Van der Waerden numbers, Discrete Math., 28 (1979), 135-146.

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(3; 3, 3, 4) = 51, and so on...

Crossrefs

Cf. A171081, A171082, A217037.

Sequence in context: A330279 A102708 A154591 * A265683 A044079 A044460

Adjacent sequences: A217232 A217233 A217234 * A217236 A217237 A217238

Keyword

nonn,more,hard

Author

Tanbir Ahmed, Sep 28 2012

Status

approved