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 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 3 |
| 5 | 11 |
| 6 | 59 |
| 7 | 779 |
| 8 | 47579 |
| 9 | 37159979 |
| 10 | 1768109008379 |
| 11 | 65702897157329640779 |
| 12 | 116169884340604934905464739377179 |
| 13 | 7632697963609645128663145969343357330533515068777579 |