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 | 9 |
| 2 | 113 |
| 3 | 1305 |
| 4 | 14561 |
| 5 | 160809 |
| 6 | 1770833 |
| 7 | 19484985 |
| 8 | 214352321 |
| 9 | 2357928009 |
| 10 | 25937365553 |
| 11 | 285311493465 |
| 12 | 3138427845281 |
| 13 | 34522710549609 |
| 14 | 379749828800273 |
| 15 | 4177248155066745 |
| 16 | 45949729820525441 |
| 17 | 505447028370153609 |