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) |
|---|---|
| 2 | 1 |
| 3 | 10 |
| 4 | 71 |
| 5 | 444 |
| 6 | 2616 |
| 7 | 14938 |
| 8 | 83821 |
| 9 | 465654 |
| 10 | 2572166 |
| 11 | 14164320 |
| 12 | 77886902 |
| 13 | 428113940 |
| 14 | 2353823912 |
| 15 | 12950837432 |
| 16 | 71326701751 |
| 17 | 393289209772 |
| 18 | 2171308560036 |
| 19 | 12003376308370 |
| 20 | 66445540183348 |
| 21 | 368304502202306 |
| 22 | 2044177115127750 |