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 | 3 |
| 2 | 4 |
| 3 | 11 |
| 4 | 125 |
| 5 | 386 |
| 6 | 2055 |
| 7 | 2441 |
| 8 | 26465 |
| 9 | 28906 |
| 10 | 84277 |
| 11 | 450291 |
| 12 | 1435150 |
| 13 | 7626041 |
| 14 | 9061191 |
| 15 | 25748423 |
| 16 | 112054883 |
| 17 | 137803306 |
| 18 | 249858189 |
| 19 | 637519684 |
| 20 | 2799936925 |
| 21 | 143434302859 |
| 22 | 146234239784 |
| 23 | 728371261995 |
| 24 | 1602976763774 |
| 25 | 3934324789543 |
| 26 | 123567045239607 |