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 | 1 |
| 1 | 40 |
| 2 | 780 |
| 3 | 7528 |
| 4 | 47878 |
| 5 | 225044 |
| 6 | 830270 |
| 7 | 2459376 |
| 8 | 5900602 |
| 9 | 11555200 |
| 10 | 18634704 |
| 11 | 24942742 |
| 12 | 27836859 |
| 13 | 25913910 |
| 14 | 20053913 |
| 15 | 12815608 |
| 16 | 6699888 |
| 17 | 2829786 |
| 18 | 948729 |
| 19 | 245756 |
| 20 | 47150 |
| 21 | 6276 |
| 22 | 518 |
| 23 | 20 |