construct/mc van der waerden
construct/mc van der waerden: a task in MathConstructOptimize-Envs-harbor (Harbor dataset). Colour the integers 1, 2, ..., 70 with 4 colours (numbered 0..3) so that there is no monochromatic arithmetic progression of length 3: no a = 1, d = 1 with a + 2 d <= 70 such that a, a+d, ..., a+2 d all…
The task
Colour the integers 1, 2, ..., 70 with 4 colours (numbered 0..3) so that there is no monochromatic arithmetic progression of length 3: no a >= 1, d >= 1 with a + 2*d <= 70 such that a, a+d, ..., a+2*d all have the same colour.