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 | 7072833120 |
| 3 | 9736020616 |
| 4 | 12852419340 |
| 5 | 36632235070 |
| 6 | 41452651506 |
| 7 | 44619665520 |
| 8 | 53569833730 |
| 9 | 54673378956 |
| 10 | 66032908020 |
| 11 | 69449109580 |
| 12 | 69936419290 |
| 13 | 82549220670 |
| 14 | 99574135650 |
| 15 | 106362659256 |
| 16 | 108208833756 |
| 17 | 113366066976 |
| 18 | 136032409906 |
| 19 | 167385272500 |
| 20 | 174963279540 |
| 21 | 195763339776 |