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 | 82 |
| 2 | 263 |
| 3 | 665 |
| 4 | 1553 |
| 5 | 3505 |
| 6 | 7777 |
| 7 | 17089 |
| 8 | 37313 |
| 9 | 81089 |
| 10 | 175553 |
| 11 | 378817 |
| 12 | 815041 |
| 13 | 1748929 |
| 14 | 3743681 |
| 15 | 7995329 |
| 16 | 17039297 |
| 17 | 36241345 |
| 18 | 76939201 |
| 19 | 163053505 |
| 20 | 344981441 |
| 21 | 728760257 |
| 22 | 1537212353 |
| 23 | 3238002625 |
| 24 | 6811549633 |
| 25 | 14310965185 |