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 | 4 |
3 | 7 |
4 | 55 |
5 | -162 |
6 | 4100 |
7 | -49030 |
8 | 779914 |
9 | -11928008 |
10 | 198650880 |
11 | -3538477560 |
12 | 70414760136 |
13 | -1571134087824 |
14 | 38788172175072 |
15 | -1028732373217200 |
16 | 28631225505910224 |
17 | -826097667884640768 |
18 | 24664145505337921920 |
19 | -765245501125015575168 |
20 | 24841409653689047496576 |