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 | -23 |
| 3 | 253 |
| 4 | -1495 |
| 5 | 4831 |
| 6 | -5819 |
| 7 | -16743 |
| 8 | 82985 |
| 9 | -113390 |
| 10 | -111113 |
| 11 | 534613 |
| 12 | -378235 |
| 13 | -577737 |
| 14 | 385089 |
| 15 | 1222243 |
| 16 | 1070121 |
| 17 | -6905933 |
| 18 | 2607970 |
| 19 | 10661421 |
| 20 | -7222345 |
| 21 | -4235979 |
| 22 | -12296099 |
| 23 | 18643273 |
| 24 | 20995205 |
| 25 | -25494394 |
| 26 | 13287951 |