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 | 3 |
| 2 | 5 |
| 3 | 3 |
| 4 | -11 |
| 5 | -45 |
| 6 | -91 |
| 7 | -93 |
| 8 | 85 |
| 9 | 627 |
| 10 | 1541 |
| 11 | 2115 |
| 12 | 181 |
| 13 | -7917 |
| 14 | -24475 |
| 15 | -41757 |
| 16 | -27371 |
| 17 | 84915 |
| 18 | 364229 |
| 19 | 753027 |
| 20 | 802165 |
| 21 | -605613 |
| 22 | -5025499 |
| 23 | -12654045 |
| 24 | -17860139 |
| 25 | -2964237 |
| 26 | 62547845 |
| 27 | 199500483 |
| 28 | 348310069 |
| 29 | 246928275 |
| 30 | -652455451 |
| 31 | -2945079453 |
| 32 | -6225416555 |