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 | 7 |
| 2 | 108 |
| 3 | 1028 |
| 4 | 8961 |
| 5 | 80692 |
| 6 | 720305 |
| 7 | 6449353 |
| 8 | 57696032 |
| 9 | 516297052 |
| 10 | 4619740712 |
| 11 | 41337798409 |
| 12 | 369890905178 |
| 13 | 3309794955133 |
| 14 | 29616122507437 |
| 15 | 265005821287188 |
| 16 | 2371278692119396 |
| 17 | 21218261329031222 |
| 18 | 189861534294482599 |