oeispy

A Python project for OEIS sequences, analysis, and factoring tools.

Structure

• src/oeispy: Main package containing sequence implementations and utilities.
  • core.py: Core sequence class.
  • sequences/: Implementations of individual OEIS sequences.
  • utils/: Helper modules (factoring, primes, etc.).
• scripts/: Executable scripts for various tasks (e.g., aliquot sequences).
• data/: Data storage for scripts.

Installation

This project uses uv for dependency management and is compatible with NixOS via shell.nix.

Prerequisites

• Python 3.8+
• uv (Python package manager)
• Nix users: Run nix-shell to load system dependencies (primesieve, gmp, mpfr).

Setup

1. Enter the environment (if using Nix):

   nix-shell

2. Install the package in editable mode:

   uv pip install -e .

Usage

You can run scripts using uv run. The scripts are located in the scripts/ directory.

Example: Running the Aliquot script

uv run scripts/aliquot.py --help

Example: Using the library in Python

from oeispy.sequences.A000040 import A000040
seq = A000040()
print(seq(1))  # Output: 2

Development

• Adding Dependencies: Update pyproject.toml and run uv pip install -e ..
• New Sequences: Add new sequence files to src/oeispy/sequences/ inheriting from oeispy.core.Sequence.