4

Part of 2015 Regional Olympiad of Mexico Southeast

Problems(1)

subject with no multiples of 3

Source: Mathematics Regional Olympiad of Mexico Southeast 2015 P4

A=\{1,2,4,5,7,8,\dots\}

the set with naturals not divisible by three. Find all values of

n

such that exist

2n

consecutive elements of

A

which sum it´s

300