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) |
|---|---|
| 0 | 1 |
| 1 | 13 |
| 2 | -223 |
| 3 | -13091 |
| 4 | 92065 |
| 5 | 21723533 |
| 6 | 101958529 |
| 7 | -49768288739 |
| 8 | -926761957183 |
| 9 | 144025448042125 |
| 10 | 5141947009489249 |
| 11 | -497734445201769763 |
| 12 | -28642623292540648607 |
| 13 | 1968988727426096533261 |
| 14 | 171559661755326400233665 |
| 15 | -8575534533295174571498723 |
| 16 | -1120252760054156502803433599 |