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 | 3 |
| 3 | 4 |
| 4 | 6 |
| 5 | 6 |
| 6 | 10 |
| 7 | 10 |
| 8 | 10 |
| 9 | 21 |
| 10 | 66 |
| 11 | 207 |
| 12 | 722 |
| 13 | 6563 |
| 14 | 25007 |
| 15 | 372733 |
| 16 | 2028763 |
| 17 | 5472218 |
| 18 | 41430101 |
| 19 | 75142985 |
| 20 | 192675195 |
| 21 | 201216921 |
| 22 | 925285050 |
| 23 | 935598827 |
| 24 | 2288358581 |
| 25 | 2346034092 |
| 26 | 26271379744 |
| 27 | 41588896504 |
| 28 | 152594692251 |
| 29 | 529451874660 |