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 | 5 |
| 1 | -1 |
| 2 | 3 |
| 3 | -7 |
| 4 | 11 |
| 5 | -16 |
| 6 | 33 |
| 7 | -57 |
| 8 | 99 |
| 9 | -178 |
| 10 | 318 |
| 11 | -562 |
| 12 | 1001 |
| 13 | -1782 |
| 14 | 3167 |
| 15 | -5632 |
| 16 | 10019 |
| 17 | -17817 |
| 18 | 31686 |
| 19 | -56355 |
| 20 | 100226 |
| 21 | -178248 |
| 22 | 317012 |
| 23 | -563800 |
| 24 | 1002705 |
| 25 | -1783291 |
| 26 | 3171548 |
| 27 | -5640532 |
| 28 | 10031571 |
| 29 | -17840946 |
| 30 | 31729758 |
| 31 | -56430727 |
| 32 | 100360899 |
| 33 | -178489813 |
| 34 | 317440493 |