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 | 27 |
| 2 | 337 |
| 3 | -12069 |
| 4 | -722175 |
| 5 | -574533 |
| 6 | 1399950609 |
| 7 | 39149968059 |
| 8 | -2784415333503 |
| 9 | -197953513837605 |
| 10 | 4478672422983249 |
| 11 | 896901929663959323 |
| 12 | 4904316613023132033 |
| 13 | -4086610128587640090501 |
| 14 | -135330870931832163283695 |
| 15 | 18773382870529500408009723 |