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 | 24 |
| 2 | 1648 |
| 3 | 14044 |
| 4 | 106892 |
| 5 | 306320 |
| 6 | 1848504 |
| 7 | 3549080 |
| 8 | 9810932 |
| 9 | 19774644 |
| 10 | 44235868 |
| 11 | 65964188 |
| 12 | 188874084 |
| 13 | 261388436 |
| 14 | 423186604 |
| 15 | 755637740 |
| 16 | 1198594384 |
| 17 | 1533264084 |
| 18 | 2755012728 |
| 19 | 3428332204 |
| 20 | 5907685880 |
| 21 | 8225807516 |