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 | 11 |
| 2 | 141 |
| 3 | 1831 |
| 4 | 23801 |
| 5 | 309411 |
| 6 | 4022341 |
| 7 | 52290431 |
| 8 | 679775601 |
| 9 | 8837082811 |
| 10 | 114882076541 |
| 11 | 1493466995031 |
| 12 | 19415070935401 |
| 13 | 252395922160211 |
| 14 | 3281146988082741 |
| 15 | 42654910845075631 |
| 16 | 554513840985983201 |