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 | 1 |
| 2 | 2 |
| 3 | 2 |
| 4 | 8 |
| 5 | 12 |
| 6 | 52 |
| 7 | 86 |
| 8 | 400 |
| 9 | 710 |
| 10 | 3404 |
| 11 | 6316 |
| 12 | 30888 |
| 13 | 59204 |
| 14 | 293192 |
| 15 | 576018 |
| 16 | 2877184 |
| 17 | 5764430 |
| 18 | 28967428 |
| 19 | 58970568 |
| 20 | 297634344 |
| 21 | 614037754 |
| 22 | 3109111064 |