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 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 3 |
| 5 | 4 |
| 6 | 22 |
| 7 | 39 |
| 8 | 102 |
| 9 | 298 |
| 10 | 833 |
| 11 | 2105 |
| 12 | 6065 |
| 13 | 16665 |
| 14 | 45374 |
| 15 | 126224 |
| 16 | 348868 |
| 17 | 962054 |
| 18 | 2662783 |
| 19 | 7364465 |
| 20 | 20366371 |
| 21 | 56334291 |
| 22 | 155844294 |
| 23 | 431150954 |
| 24 | 1192657061 |
| 25 | 3299782775 |
| 26 | 9128883051 |
| 27 | 25255840216 |
| 28 | 69873935349 |
| 29 | 193313945656 |
| 30 | 534830511278 |