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 | 3 |
| 5 | 3 |
| 6 | 7 |
| 7 | 8 |
| 8 | 25 |
| 9 | 25 |
| 10 | 82 |
| 11 | 85 |
| 12 | 302 |
| 13 | 307 |
| 14 | 1111 |
| 15 | 1131 |
| 16 | 4216 |
| 17 | 4267 |
| 18 | 16076 |
| 19 | 16253 |
| 20 | 61976 |
| 21 | 62475 |
| 22 | 239927 |
| 23 | 241447 |
| 24 | 933576 |
| 25 | 937574 |
| 26 | 3644073 |
| 27 | 3653624 |
| 28 | 14267757 |
| 29 | 14281711 |
| 30 | 55996279 |
| 31 | 55968648 |
| 32 | 220244340 |
| 33 | 219829297 |
| 34 | 867868410 |
| 35 | 865120447 |
| 36 | 3425522409 |
| 37 | 3410557920 |
| 38 | 13540713898 |
| 39 | 13466370893 |
| 40 | 53596553368 |