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 | 5 |
| 2 | 34 |
| 3 | 213 |
| 4 | 1292 |
| 5 | 7771 |
| 6 | 46650 |
| 7 | 279929 |
| 8 | 1679608 |
| 9 | 10077687 |
| 10 | 60466166 |
| 11 | 362797045 |
| 12 | 2176782324 |
| 13 | 13060694003 |
| 14 | 78364164082 |
| 15 | 470184984561 |
| 16 | 2821109907440 |
| 17 | 16926659444719 |
| 18 | 101559956668398 |
| 19 | 609359740010477 |
| 20 | 3656158440062956 |
| 21 | 21936950640377835 |
| 22 | 131621703842267114 |
| 23 | 789730223053602793 |