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 | 8 |
| 2 | 92 |
| 3 | 1160 |
| 4 | 15276 |
| 5 | 206368 |
| 6 | 2835200 |
| 7 | 39419864 |
| 8 | 553000876 |
| 9 | 7811733392 |
| 10 | 110962066532 |
| 11 | 1583318009160 |
| 12 | 22677731944032 |
| 13 | 325849065291056 |
| 14 | 4694837606889424 |
| 15 | 67803714186207280 |
| 16 | 981265566082447276 |
| 17 | 14227018304102548368 |
| 18 | 206608052310739404392 |
| 19 | 3004777578508008253808 |