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 | 3 |
| 2 | 54 |
| 3 | 569 |
| 4 | 6500 |
| 5 | 72717 |
| 6 | 880415 |
| 7 | 9616078 |
| 8 | 105052677 |
| 9 | 1139295891 |
| 10 | 12676601300 |
| 11 | 135996846047 |
| 12 | 1450287630358 |