Distinct Parts
How many ways are there to write 20 as a sum of distinct positive integers, where the order of the summands does not matter? The one-term sum "20" counts. Give an integer.
Related problems & prerequisites
Worth solving first
- Partitions of Fifteen 3.0/10
- Integer Triangles of Perimeter Thirty 2.0/10
- Making Change 1.7/10
Source: Classic exercise in wide circulation; no traceable original source. Statement written for AxiomIQ.