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 | 2 |
| 2 | 5 |
| 3 | 47 |
| 4 | 146 |
| 5 | 1507 |
| 6 | 1653 |
| 7 | 8119 |
| 8 | 147795 |
| 9 | 155914 |
| 10 | 615537 |
| 11 | 3233599 |
| 12 | 10316334 |
| 13 | 13549933 |
| 14 | 50966133 |
| 15 | 166448332 |
| 16 | 217414465 |
| 17 | 383862797 |
| 18 | 2136728450 |
| 19 | 6794048147 |
| 20 | 56489113626 |
| 21 | 63283161773 |
| 22 | 183055437172 |
| 23 | 246338598945 |
| 24 | 15456048571762 |