Calculate the sum of progression whose recurrence relation is

Enter the value p, q, and r and the range and click the button "Calculate sum of progression", and the sum of the progression of the specified range and value between the first term to 20th is calculated are displayed.

### The sum of 2th to 5th number in arithmetic progression whose recurrence relation is 2a^2 + 3a + 1

2th number: 15

5th number: 66

The sum of 2th to 5th: 154

nth | Value |
---|---|

1 | 6 |

2 | 15 |

3 | 28 |

4 | 45 |

5 | 66 |

6 | 91 |

7 | 120 |

8 | 153 |

9 | 190 |

10 | 231 |

11 | 276 |

12 | 325 |

13 | 378 |

14 | 435 |

15 | 496 |

16 | 561 |

17 | 630 |

18 | 703 |

19 | 780 |

20 | 861 |