the square of 1 is 1 |

the square of 2 is 4 |

the square of 3 is 9 |

the square of 4 is 16 |

the square of 5 is 25 |

the square of 6 is 36 |

the square of 7 is 49 |

the square of 8 is 64 |

the square of 9 is 81 |

the square of 10 is 100 |

the square of 11 is 121 |

the square of 12 is 144 |

the square of 13 is 169 |

the square of 14 is 196 |

the square of 15 is 225 |

the square of 16 is 256 |

the square of 17 is 289 |

the square of 18 is 324 |

the square of 19 is 361 |

the square of 20 is 400 |