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A135415 Van der Waerden numbers for 3-arithmetic progressions with n colors. 3
3, 9, 27, 76 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

It is known that a(5) > 170.

LINKS

Table of n, a(n) for n=1..4.

Eric Weisstein's World of Mathematics, Van der Waerden numbers

Wikipedia, Van der Waerden number

CROSSREFS

Cf. A005346.

Sequence in context: A289693 A269684 A330079 * A182897 A228734 A048481

Adjacent sequences:  A135412 A135413 A135414 * A135416 A135417 A135418

KEYWORD

nonn,hard,more

AUTHOR

Hunter Monroe (hmonroe(AT)huntermonroe.com), Feb 17 2008

EXTENSIONS

a(1) prepended by Jinyuan Wang, Mar 13 2020

STATUS

approved

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Last modified January 20 16:04 EST 2022. Contains 350472 sequences. (Running on oeis4.)