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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 13 |
| 3 | 469 |
| 4 | 63577 |
| 5 | 33231721 |
| 6 | 68519123173 |
| 7 | 562469619451069 |
| 8 | 18442242396353040817 |
| 9 | 2417685638793025070212561 |
| 10 | 1267626422541873052658376446653 |
| 11 | 2658442047546208031914776455678477989 |
| 12 | 22300713297142388711251601783864453690641417 |