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 | 0 |
| 2 | 1 |
| 3 | 4 |
| 4 | 9 |
| 5 | 11 |
| 6 | 22 |
| 7 | 75 |
| 8 | 105 |
| 9 | 449 |
| 10 | 425 |
| 11 | 1426 |
| 12 | 2837 |
| 13 | 4765 |
| 14 | 2775 |
| 15 | 21895 |
| 16 | 57558 |
| 17 | 87602 |
| 18 | 145177 |
| 19 | 123788 |
| 20 | 694479 |
| 21 | 677326 |
| 22 | 1516496 |
| 23 | 3363284 |
| 24 | 2048443 |
| 25 | 26968428 |
| 26 | 24488513 |
| 27 | 98733728 |