# Tetrapent Triplet Oddities

## Introduction

An *oddity*
is a figure with binary symmetry formed by an odd number of copies of
a polyform.
Oddities can also be constructed from sets of different shapes.
Here are the minimal known oddities for triplets of tetrapents,
using at least one copy of each tetrapent.
Please write if you find a smaller solution or solve an unsolved case.

See also Tetrapent Oddities
and Tetrapent Pair Oddities.

Tiles | Triplets |

3 | 1 |

5 | 29 |

7 | 4 |

— | 1 |

### Impossible

Tiles | Triplets |

5 | 14 |

7 | 13 |

9 | 5 |

11 | 1 |

13 | 1 |

— | 1 |

### Impossible

Tiles | Triplets |

25 | 10 |

35 | 15 |

45 | 4 |

65 | 1 |

— | 1 |

? | 4 |

### Impossible

### Unsolved

*Last revised 2023-11-13.*

Back to Polyform Oddities
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Polyform Curiosities

Col. George Sicherman
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