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 | 10 |
| 2 | 28 |
| 3 | 80 |
| 4 | 230 |
| 5 | 664 |
| 6 | 1922 |
| 7 | 5574 |
| 8 | 16188 |
| 9 | 47064 |
| 10 | 136946 |
| 11 | 398746 |
| 12 | 1161634 |
| 13 | 3385486 |
| 14 | 9869934 |
| 15 | 28781908 |
| 16 | 83948652 |
| 17 | 244894048 |
| 18 | 714493794 |
| 19 | 2084792450 |
| 20 | 6083620812 |
| 21 | 17753709802 |
| 22 | 51812911858 |
| 23 | 151218254846 |
| 24 | 441351052720 |