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 | 5 |
| 2 | 23 |
| 3 | 81 |
| 4 | 367 |
| 5 | 1297 |
| 6 | 5871 |
| 7 | 20753 |
| 8 | 93935 |
| 9 | 332049 |
| 10 | 1502959 |
| 11 | 5312785 |
| 12 | 24047343 |
| 13 | 85004561 |
| 14 | 384757487 |
| 15 | 1360072977 |
| 16 | 6156119791 |
| 17 | 21761167633 |
| 18 | 98497916655 |
| 19 | 348178682129 |
| 20 | 1575966666479 |
| 21 | 5570858914065 |
| 22 | 25215466663663 |
| 23 | 89133742625041 |