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 | 10 |
| 5 | 29 |
| 6 | 164 |
| 7 | 534 |
| 8 | 1839 |
| 9 | 7813 |
| 10 | 28888 |
| 11 | 106712 |
| 12 | 423250 |
| 13 | 1621048 |
| 14 | 6175114 |
| 15 | 24116312 |
| 16 | 93457176 |
| 17 | 361166949 |
| 18 | 1408515216 |
| 19 | 5488264319 |
| 20 | 21368029926 |
| 21 | 83497729588 |
| 22 | 326481132377 |
| 23 | 1276713094911 |
| 24 | 5001089844661 |
| 25 | 19605767057292 |