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 | 288 |
| 3 | 47239 |
| 4 | 6279393 |
| 5 | 749866185 |
| 6 | 83949041929 |
| 7 | 9009490924794 |
| 8 | 939356338522456 |
| 9 | 95972872569551099 |
| 10 | 9664595615275994739 |
| 11 | 963147644297772022870 |
| 12 | 95261720343073832781620 |
| 13 | 9370213923827917022436855 |