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 | 8 |
| 2 | 62 |
| 3 | 482 |
| 4 | 3746 |
| 5 | 29114 |
| 6 | 226274 |
| 7 | 1758602 |
| 8 | 13667858 |
| 9 | 106226618 |
| 10 | 825593474 |
| 11 | 6416514026 |
| 12 | 49869159026 |
| 13 | 387583197338 |
| 14 | 3012297335522 |
| 15 | 23411580532682 |
| 16 | 181954847741906 |
| 17 | 1414153417389434 |
| 18 | 10990803008177474 |
| 19 | 85420541561578922 |
| 20 | 663888608980117298 |
| 21 | 5159743512230294618 |