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 | 6 |
| 2 | 34 |
| 3 | 188 |
| 4 | 1026 |
| 5 | 5556 |
| 6 | 29940 |
| 7 | 160824 |
| 8 | 862018 |
| 9 | 4613636 |
| 10 | 24667644 |
| 11 | 131795912 |
| 12 | 703812916 |
| 13 | 3757135752 |
| 14 | 20051429544 |
| 15 | 106992663408 |
| 16 | 570827898306 |
| 17 | 3045193326372 |
| 18 | 16244056119084 |
| 19 | 86646747723048 |
| 20 | 462161936699196 |
| 21 | 2465043081687192 |
| 22 | 13147597801986264 |
| 23 | 70123266087502608 |