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 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 11 |
| 5 | 31 |
| 6 | 107 |
| 7 | 379 |
| 8 | 1451 |
| 9 | 5611 |
| 10 | 22187 |
| 11 | 87979 |
| 12 | 350891 |
| 13 | 1400491 |
| 14 | 5597867 |
| 15 | 22379179 |
| 16 | 89500331 |
| 17 | 357952171 |
| 18 | 1431743147 |
| 19 | 5726775979 |
| 20 | 22906841771 |
| 21 | 91626580651 |
| 22 | 366505274027 |
| 23 | 1466017950379 |
| 24 | 5864067607211 |