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 | 3 |
| 3 | 12 |
| 4 | -52 |
| 5 | -27 |
| 6 | 1269 |
| 7 | 1318 |
| 8 | 5414 |
| 9 | 4685 |
| 10 | 14685 |
| 11 | 14806 |
| 12 | 3000790 |
| 13 | 3000959 |
| 14 | 3039375 |
| 15 | 3090000 |
| 16 | 2041424 |
| 17 | 2041713 |
| 18 | 36053937 |
| 19 | 36054298 |
| 20 | 100054298 |
| 21 | 100248779 |
| 22 | 100483035 |
| 23 | 100483564 |
| 24 | 110175797740 |
| 25 | 110175782115 |
| 26 | 110176239091 |
| 27 | 110176770532 |
| 28 | 110658660836 |