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 | 9 |
| 3 | 91 |
| 4 | 969 |
| 5 | 10626 |
| 6 | 118755 |
| 7 | 1344904 |
| 8 | 15380937 |
| 9 | 177232627 |
| 10 | 2054455634 |
| 11 | 23930713170 |
| 12 | 279871768995 |
| 13 | 3284214703056 |
| 14 | 38650751381832 |
| 15 | 456002537343216 |
| 16 | 5391644226101705 |
| 17 | 63871405575418665 |
| 18 | 757929628541719755 |