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 | 15 |
| 3 | 327 |
| 4 | 3904 |
| 5 | 47525 |
| 6 | 590450 |
| 7 | 7087898 |
| 8 | 79504457 |
| 9 | 887852429 |
| 10 | 9862623240 |
| 11 | 110885914721 |
| 12 | 1199346258292 |