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 | 2 |
| 2 | 5 |
| 3 | 14 |
| 4 | 41 |
| 5 | 122 |
| 6 | 363 |
| 7 | 1066 |
| 8 | 3046 |
| 9 | 8300 |
| 10 | 20791 |
| 11 | 43738 |
| 12 | 51297 |
| 13 | -174406 |
| 14 | -1825027 |
| 15 | -10480330 |
| 16 | -50143510 |
| 17 | -218385772 |
| 18 | -895007802 |
| 19 | -3504952380 |
| 20 | -13214355159 |
| 21 | -48116028934 |
| 22 | -169216483595 |
| 23 | -573113441834 |
| 24 | -1856620607526 |
| 25 | -5675964306988 |
| 26 | -15927363432481 |