Initial commit

Basic build infrastructure, license, and readme files.

README.md

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+# Triangle Square Cubes
+
+Following Matt Parker's Video on Squares of Triangle Numbers being sum of cubes,
+and the Partridge Problem: https://youtu.be/eqyuQZHfNPQ?si=hbOQdVKBC-jwvysk.
+
+This repository contains code that will find solutions to the problem.
+
+## Copyright & Licence
+
+This code is copyright 2025 Matthew Gretton-Dann.  Licensed under the
+Apache-2.0 license.
+
+## Running the code
+
+### Initial setup
+
+Prerequisite is to have `git` and `opam` installed on the path.
+
+```sh
+git clone ...
+cd triangle-square-cubes
+opam switch create .
+opam update
+opam install . --deps-only
+```
+
+### Building
+
+```sh
+dune build
+```
+
+### Testing
+
+```sh
+dune runtest
+```
+
+### Executing
+
+```sh
+N=9 # Set N to largest size of square.
+dune exec partridge $N
+```