Groupoid of OEIS A001844 Numbers (centered square numbers)
Amelia Carolina Sparavigna · Zenodo (CERN European Organization for Nuclear Research) · 2019
Here we discuss the binary operator of the set made by the OEIS sequence of integers A001844, defined as centered square numbers. This binary operator can be used to have a groupoid. Actually, neutral and opposite elements can be defined too, and a possible group for these numbers can be given.