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 | 23 |
| 2 | 79 |
| 3 | -18883 |
| 4 | -540959 |
| 5 | 21547343 |
| 6 | 1712746639 |
| 7 | -18784653403 |
| 8 | -5827198941119 |
| 9 | -66400823394937 |
| 10 | 22072936773448399 |
| 11 | 806481251066529677 |
| 12 | -90711968254039392479 |
| 13 | -6441374025602166282817 |
| 14 | 382513411697280621497359 |
| 15 | 49378464830331101876186357 |