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 | -1 |
| 2 | -7 |
| 3 | -14 |
| 4 | 10 |
| 5 | 93 |
| 6 | 242 |
| 7 | 229 |
| 8 | -410 |
| 9 | -2446 |
| 10 | -5500 |
| 11 | -6458 |
| 12 | 4062 |
| 13 | 38899 |
| 14 | 104715 |
| 15 | 165843 |
| 16 | 103045 |
| 17 | -327200 |
| 18 | -1393131 |
| 19 | -3075317 |
| 20 | -4305200 |
| 21 | -2069461 |
| 22 | 9129361 |
| 23 | 35219829 |
| 24 | 75832840 |
| 25 | 109569915 |
| 26 | 74818084 |
| 27 | -143480059 |
| 28 | -686408279 |
| 29 | -1607860793 |
| 30 | -2614721006 |
| 31 | -2674073316 |