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 | 5 |
| 2 | 33 |
| 3 | 233 |
| 4 | 1734 |
| 5 | 13487 |
| 6 | 111460 |
| 7 | 950039 |
| 8 | 8282970 |
| 9 | 73631430 |
| 10 | 662319904 |
| 11 | 6022446576 |
| 12 | 55201746383 |