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 | 10 |
| 4 | 29 |
| 5 | 91 |
| 6 | 370 |
| 7 | 1305 |
| 8 | 4626 |
| 9 | 17888 |
| 10 | 66824 |
| 11 | 248839 |
| 12 | 955688 |
| 13 | 3646596 |
| 14 | 13892482 |
| 15 | 53548120 |
| 16 | 206439059 |
| 17 | 795884541 |
| 18 | 3083453744 |
| 19 | 11962794031 |
| 20 | 46444491143 |
| 21 | 180751142106 |
| 22 | 704383034528 |
| 23 | 2747337971249 |
| 24 | 10730723024786 |