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 | 5 |
| 2 | -5 |
| 3 | -9 |
| 4 | 115 |
| 5 | -397 |
| 6 | 85 |
| 7 | 6625 |
| 8 | -36181 |
| 9 | 63915 |
| 10 | 377365 |
| 11 | -3357175 |
| 12 | 10579245 |
| 13 | 12408269 |
| 14 | -295386005 |
| 15 | 1383403247 |
| 16 | -1317964405 |
| 17 | -23051599205 |
| 18 | 159765455077 |
| 19 | -392146366775 |
| 20 | -1358686166755 |
| 21 | 16622987639325 |
| 22 | -64283150090725 |
| 23 | -10522422920465 |
| 24 | 1532928077704325 |
| 25 | -8583492124492507 |