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 | 5 |
| 4 | 14 |
| 5 | 48 |
| 6 | 42 |
| 7 | 2452 |
| 8 | 462 |
| 9 | 132 |
| 10 | 183958 |
| 11 | 6006 |
| 12 | 4877756 |
| 13 | 429 |
| 14 | 1680384 |
| 15 | 24024 |
| 16 | 17454844 |
| 17 | 87516 |
| 18 | 20071150430 |
| 19 | 1430 |
| 20 | 409158464142 |
| 21 | 1662804 |
| 22 | 1941406508 |
| 23 | 1385670 |
| 24 | 129586764260850 |
| 25 | 4862 |
| 26 | 269333638458151764 |
| 27 | 140229804 |
| 28 | 6405442434150 |
| 29 | 242201554680 |
| 30 | 6708527580006468 |