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 | 2 |
| 3 | 0 |
| 4 | 0 |
| 5 | 4 |
| 6 | -1 |
| 7 | -6 |
| 8 | 1 |
| 9 | -7 |
| 10 | -63 |
| 11 | -53 |
| 12 | -64 |
| 13 | -768 |
| 14 | -755 |
| 15 | -769 |
| 16 | -11535 |
| 17 | -11519 |
| 18 | -11536 |
| 19 | -207648 |
| 20 | -207629 |
| 21 | -207649 |
| 22 | -4360629 |
| 23 | -4360607 |
| 24 | -4360630 |
| 25 | -104655120 |
| 26 | -104655095 |
| 27 | -104655121 |
| 28 | -2825688267 |
| 29 | -2825688239 |
| 30 | -2825688268 |
| 31 | -84770648040 |
| 32 | -84770648009 |