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 | 14 |
| 3 | 154 |
| 4 | 1568 |
| 5 | 15484 |
| 6 | 150920 |
| 7 | 1462552 |
| 8 | 14137088 |
| 9 | 136492048 |
| 10 | 1317130976 |
| 11 | 12707167648 |
| 12 | 122580846080 |
| 13 | 1182430803904 |
| 14 | 11405635719296 |
| 15 | 110016806306176 |
| 16 | 1061198588076032 |
| 17 | 10236074368205056 |
| 18 | 98734700455677440 |