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 | 1 |
| 2 | 16 |
| 3 | 97 |
| 4 | 337 |
| 5 | 2177 |
| 6 | 7313 |
| 7 | 38529 |
| 8 | 108594 |
| 9 | 717186 |
| 10 | 2053522 |
| 11 | 7527458 |
| 12 | 30757155 |
| 13 | 88042387 |
| 14 | 448973459 |
| 15 | 1390503396 |
| 16 | 4087546309 |
| 17 | 12699966117 |
| 18 | 49599776261 |
| 19 | 124699632310 |
| 20 | 608410782855 |
| 21 | 1651128186296 |
| 22 | 4862631132392 |
| 23 | 13170300313769 |
| 24 | 39285370060347 |
| 25 | 130999461143020 |