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 | 1 |
| 3 | 1 |
| 4 | 4 |
| 5 | 11 |
| 6 | 41 |
| 7 | 162 |
| 8 | 1030 |
| 9 | 7205 |
| 10 | 55522 |
| 11 | 442443 |
| 12 | 3810852 |
| 13 | 35272030 |
| 14 | 351697516 |
| 15 | 3735838550 |
| 16 | 42719792640 |
| 17 | 529195988635 |
| 18 | 7128835815387 |
| 19 | 103651381499810 |
| 20 | 1610812109555323 |
| 21 | 26489497655582729 |
| 22 | 457497408108551450 |
| 23 | 8248899117402701046 |
| 24 | 154624472715479106919 |