A171082 Van der Waerden numbers w(2;4,n).

35, 55, 73, 109, 146, 309

Offset

4,1

Links

Table of n, a(n) for n=4..9.

Tanbir Ahmed, Van der Waerden numbers

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

Crossrefs

Cf. A005346, A171081, A217235.

Sequence in context: A359448 A355812 A318572 * A340269 A335902 A121707

Adjacent sequences: A171079 A171080 A171081 * A171083 A171084 A171085

Keyword

nonn,hard,more

Author

N. J. A. Sloane, based on an email from Tanbir Ahmed, Sep 07 2010 and Feb 22 2012

Status

approved