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 | 2 |
| 3 | 5 |
| 4 | 12 |
| 5 | 34 |
| 6 | 115 |
| 7 | 446 |
| 8 | 1881 |
| 9 | 8386 |
| 10 | 38472 |
| 11 | 179701 |
| 12 | 849285 |
| 13 | 4047541 |
| 14 | 19415118 |
| 15 | 93623028 |
| 16 | 453486806 |
| 17 | 2205081449 |
| 18 | 10758731196 |
| 19 | 52651373968 |
| 20 | 258365785954 |
| 21 | 1270930958357 |
| 22 | 6265738653554 |
| 23 | 30952863554094 |
| 24 | 153191072337297 |