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 | 0 |
| 1 | 1430 |
| 2 | 389367 |
| 3 | 7152444 |
| 4 | 58261125 |
| 5 | 303719922 |
| 6 | 1188576675 |
| 7 | 3804949176 |
| 8 | 10495906641 |
| 9 | 25810820750 |
| 10 | 57928578191 |
| 11 | 120681823860 |
| 12 | 236332181085 |
| 13 | 439263172458 |
| 14 | 780774342075 |
| 15 | 1335176857200 |
| 16 | 2207407644585 |
| 17 | 3542395893894 |
| 18 | 5536432537895 |
| 19 | 8450810096300 |
| 20 | 12628017047349 |