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 | 0 |
| 2 | 61 |
| 3 | 269 |
| 4 | 353 |
| 5 | 1219 |
| 6 | 3621 |
| 7 | 14125 |
| 8 | 38410 |
| 9 | 108141 |
| 10 | 360173 |
| 11 | 1180191 |
| 12 | 3638642 |
| 13 | 10951971 |
| 14 | 34382642 |
| 15 | 110622932 |
| 16 | 345400729 |
| 17 | 1067870597 |
| 18 | 3335600289 |
| 19 | 10545285109 |
| 20 | 33108634169 |
| 21 | 103257933927 |
| 22 | 322928627439 |
| 23 | 1014950085156 |
| 24 | 3186150407886 |