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) |
|---|---|
| 7 | 189 |
| 8 | 627 |
| 9 | 1633 |
| 10 | 4291 |
| 11 | 12146 |
| 12 | 38795 |
| 13 | 129520 |
| 14 | 469662 |
| 15 | 1281977 |
| 16 | 3286121 |
| 17 | 8402785 |
| 18 | 21706131 |
| 19 | 58633404 |
| 20 | 157849186 |
| 21 | 439490771 |
| 22 | 1128233084 |
| 23 | 2793077829 |
| 24 | 6823503775 |
| 25 | 16758669067 |
| 26 | 41349963758 |
| 27 | 101704832977 |
| 28 | 255372664080 |
| 29 | 622178277449 |
| 30 | 1484157011512 |
| 31 | 3512057801972 |