cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A291420 Numbers n such that there exist exactly four distinct Pythagorean triangles, at least one of them primitive, with area n.

Table of values

n a(n)
1 341880
2 8168160
3 14636160
4 17957940
5 52492440
6 116396280
7 1071572040
8 1187525640
9 1728483120
10 5988702720
11 6609482880
12 22539095040
13 29239970760
14 136496680320
15 258670630680
16 398648544840
17 494892478080
18 592003418160
19 1329673884000
20 1343798407560
21 2190884461920

List of values

[341880, 8168160, 14636160, 17957940, 52492440, 116396280, 1071572040, 1187525640, 1728483120, 5988702720, 6609482880, 22539095040, 29239970760, 136496680320, 258670630680, 398648544840, 494892478080, 592003418160, 1329673884000, 1343798407560, 2190884461920]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.