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 | 21 |
| 3 | 1045 |
| 4 | 93289 |
| 5 | 12975561 |
| 6 | 2581284541 |
| 7 | 693347907421 |
| 8 | 241253367679185 |
| 9 | 105394372192969489 |
| 10 | 56410454014314490981 |
| 11 | 36271084122927079387941 |
| 12 | 27567930377271475039277881 |
| 13 | 24435533594428382909107147225 |