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 | 3 |
| 4 | 8 |
| 5 | 11 |
| 6 | 41 |
| 7 | 52 |
| 8 | 249 |
| 9 | 301 |
| 10 | 1754 |
| 11 | 2055 |
| 12 | 14084 |
| 13 | 16139 |
| 14 | 127057 |
| 15 | 143196 |
| 16 | 1272625 |
| 17 | 1415821 |
| 18 | 14015014 |
| 19 | 15430835 |
| 20 | 168323364 |
| 21 | 183754199 |
| 22 | 2189619553 |
| 23 | 2373373752 |
| 24 | 30670104577 |
| 25 | 33043478329 |
| 26 | 460235322854 |
| 27 | 493278801183 |