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.
n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 1 |
4 | 21 |
5 | -122 |
6 | 1752 |
7 | -21730 |
8 | 309166 |
9 | -4521032 |
10 | 70344768 |
11 | -1173530712 |
12 | 21642745704 |
13 | -448130571696 |
14 | 10352684535840 |
15 | -260101132095888 |
16 | 6921279885508848 |
17 | -191813249398678272 |
18 | 5502934340821289088 |
19 | -163695952380982280832 |
20 | 5078687529186002247552 |