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 | 4 |
| 2 | 23 |
| 3 | 141 |
| 4 | 915 |
| 5 | 6375 |
| 6 | 46799 |
| 7 | 355805 |
| 8 | 2774348 |
| 9 | 22023132 |
| 10 | 177273427 |
| 11 | 1443074791 |
| 12 | 11855541525 |
| 13 | 98146301284 |
| 14 | 817786989282 |