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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 6 |
| 6 | 22 |
| 7 | 16 |
| 8 | 66 |
| 9 | 83 |
| 10 | 300 |
| 11 | 296 |
| 12 | 2243 |
| 13 | 1778 |
| 14 | 9780 |
| 15 | 20640 |
| 16 | 58428 |
| 17 | 79554 |
| 18 | 600798 |
| 19 | 567544 |
| 20 | 3671978 |
| 21 | 6935746 |
| 22 | 23785912 |
| 23 | 31017008 |
| 24 | 246156513 |
| 25 | 282456333 |
| 26 | 1357927400 |
| 27 | 2615206733 |
| 28 | 11358512518 |