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 | 4 |
| 3 | 23 |
| 4 | 185 |
| 5 | 1647 |
| 6 | 16455 |
| 7 | 169734 |
| 8 | 1805028 |
| 9 | 19472757 |
| 10 | 212603589 |
| 11 | 2341275180 |
| 12 | 25969695728 |
| 13 | 289782412836 |
| 14 | 3250137255678 |