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 | 3 |
| 2 | 11 |
| 3 | 59 |
| 4 | 419 |
| 5 | 4619 |
| 6 | 60059 |
| 7 | 1021019 |
| 8 | 19399379 |
| 9 | 446185739 |
| 10 | 12939386459 |
| 11 | 401120980259 |
| 12 | 14841476269619 |
| 13 | 608500527054419 |
| 14 | 26165522663340059 |
| 15 | 1229779565176982819 |
| 16 | 65178316954380089459 |
| 17 | 3845520700308425278139 |
| 18 | 234576762718813941966539 |