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 | 2 |
| 3 | 4 |
| 4 | 6 |
| 5 | 10 |
| 6 | 34 |
| 7 | 186 |
| 8 | 422 |
| 9 | 760 |
| 10 | 1765 |
| 11 | 4112 |
| 12 | 4585 |
| 13 | 8112 |
| 14 | 8650 |
| 15 | 8861 |
| 16 | 75150 |
| 17 | 223993 |
| 18 | 327048 |
| 19 | 712605 |
| 20 | 1135940 |
| 21 | 23958638 |
| 22 | 42367759 |
| 23 | 47848742 |
| 24 | 54626559 |
| 25 | 121984495 |
| 26 | 157877985 |
| 27 | 413509327 |
| 28 | 798321315 |
| 29 | 983679985 |
| 30 | 1277946119 |
| 31 | 2403158480 |