MathDB
ASU 300 All Soviet Union MO 1980 integer set with min 1, max 100

Source:

July 19, 2019
setinteger setminimumcombinatorics

Problem Statement

The AA set consists of integers only. Its minimal element is 11 and its maximal element is 100100. Every element of AA except 11 equals to the sum of two (may be equal) numbers being contained in AA. What is the least possible number of elements in AA?