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) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 11 |
| 6 | 33 |
| 7 | 92 |
| 8 | 347 |
| 9 | 1347 |
| 10 | 6338 |
| 11 | 31949 |
| 12 | 179265 |
| 13 | 1071264 |
| 14 | 6845487 |
| 15 | 46162569 |
| 16 | 327731596 |
| 17 | 2437753739 |
| 18 | 18948597836 |
| 19 | 153498350744 |
| 20 | 1293123237572 |
| 21 | 11306475314372 |
| 22 | 102425554267565 |
| 23 | 959826755336241 |
| 24 | 9290811905211847 |