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) |
|---|---|
| 0 | 2 |
| 1 | 6 |
| 2 | 32 |
| 3 | 203 |
| 4 | 1144 |
| 5 | 5345 |
| 6 | 20926 |
| 7 | 70506 |
| 8 | 209746 |
| 9 | 562727 |
| 10 | 1384758 |
| 11 | 3167606 |
| 12 | 6807620 |
| 13 | 13863904 |
| 14 | 26941700 |
| 15 | 50245591 |
| 16 | 90358146 |
| 17 | 157312324 |
| 18 | 266040452 |
| 19 | 438299013 |
| 20 | 705186944 |
| 21 | 1110395771 |
| 22 | 1714352818 |
| 23 | 2599444040 |
| 24 | 3876530866 |