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 | 3 |
| 3 | 4 |
| 4 | 14 |
| 5 | 30 |
| 6 | 107 |
| 7 | 318 |
| 8 | 1116 |
| 9 | 3743 |
| 10 | 13240 |
| 11 | 46476 |
| 12 | 166358 |
| 13 | 596638 |
| 14 | 2158829 |
| 15 | 7839845 |
| 16 | 28616815 |
| 17 | 104814161 |
| 18 | 385269397 |
| 19 | 1420242629 |
| 20 | 5249877583 |
| 21 | 19452536934 |
| 22 | 72237904034 |