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 | 2 |
| 4 | 5 |
| 5 | 9 |
| 6 | 24 |
| 7 | 41 |
| 8 | 121 |
| 9 | 213 |
| 10 | 522 |
| 11 | 783 |
| 12 | 2712 |
| 13 | 3179 |
| 14 | 8672 |
| 15 | 16621 |
| 16 | 37415 |
| 17 | 48558 |
| 18 | 154660 |
| 19 | 185007 |
| 20 | 573296 |
| 21 | 876633 |
| 22 | 1759730 |
| 23 | 2606543 |
| 24 | 8768743 |
| 25 | 10774339 |