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 | 1 |
| 3 | 7 |
| 4 | -8 |
| 5 | 1 |
| 6 | -163 |
| 7 | 189 |
| 8 | -27 |
| 9 | 1 |
| 10 | 8983 |
| 11 | -10432 |
| 12 | 1512 |
| 13 | -64 |
| 14 | 1 |
| 15 | -966751 |
| 16 | 1122875 |
| 17 | -163000 |
| 18 | 7000 |
| 19 | -125 |
| 20 | 1 |
| 21 | 179781181 |
| 22 | -208818216 |
| 23 | 30317625 |
| 24 | -1304000 |
| 25 | 23625 |
| 26 | -216 |
| 27 | 1 |
| 28 | -53090086057 |
| 29 | 61664945083 |
| 30 | -8953081011 |
| 31 | 385146125 |
| 32 | -6988625 |
| 33 | 64827 |
| 34 | -343 |
| 35 | 1 |
| 36 | 23402291822743 |
| 37 | -27182124061184 |
| 38 | 3946556485312 |
| 39 | -169776943616 |
| 40 | 3081169000 |
| 41 | -28625408 |
| 42 | 153664 |
| 43 | -512 |
| 44 | 1 |