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 | 3 |
| 1 | 4 |
| 2 | -17 |
| 3 | -24 |
| 4 | 99 |
| 5 | 140 |
| 6 | -577 |
| 7 | -816 |
| 8 | 3363 |
| 9 | 4756 |
| 10 | -19601 |
| 11 | -27720 |
| 12 | 114243 |
| 13 | 161564 |
| 14 | -665857 |
| 15 | -941664 |
| 16 | 3880899 |
| 17 | 5488420 |
| 18 | -22619537 |
| 19 | -31988856 |
| 20 | 131836323 |
| 21 | 186444716 |
| 22 | -768398401 |
| 23 | -1086679440 |
| 24 | 4478554083 |
| 25 | 6333631924 |
| 26 | -26102926097 |
| 27 | -36915112104 |
| 28 | 152139002499 |
| 29 | 215157040700 |