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 | 2187 |
| 2 | 102069 |
| 3 | 739672 |
| 4 | 2743444 |
| 5 | 7400832 |
| 6 | 16795265 |
| 7 | 34534687 |
| 8 | 67029572 |
| 9 | 125640165 |
| 10 | 230434296 |
| 11 | 416688642 |
| 12 | 746070578 |
| 13 | 1325631005 |
| 14 | 2339607173 |
| 15 | 4101879980 |
| 16 | 7141164265 |
| 17 | 12337189420 |
| 18 | 21134985710 |
| 19 | 35876879602 |
| 20 | 60309132371 |
| 21 | 100343859256 |