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 | 6 |
| 1 | -1 |
| 2 | -3 |
| 3 | -1 |
| 4 | 17 |
| 5 | -16 |
| 6 | -15 |
| 7 | 13 |
| 8 | 81 |
| 9 | -127 |
| 10 | -58 |
| 11 | 175 |
| 12 | 329 |
| 13 | -885 |
| 14 | -31 |
| 15 | 1424 |
| 16 | 833 |
| 17 | -5543 |
| 18 | 2181 |
| 19 | 9233 |
| 20 | -2298 |
| 21 | -31025 |
| 22 | 27893 |
| 23 | 49495 |
| 24 | -54879 |
| 25 | -150416 |
| 26 | 245697 |
| 27 | 204965 |
| 28 | -526887 |
| 29 | -570895 |
| 30 | 1801670 |
| 31 | 407711 |
| 32 | -3882303 |
| 33 | -946397 |
| 34 | 11542929 |
| 35 | -3442672 |
| 36 | -24121039 |
| 37 | 10317745 |
| 38 | 64959629 |
| 39 | -56727711 |
| 40 | -127083514 |