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 | 7 |
| 3 | 155 |
| 4 | 11811 |
| 5 | 3309747 |
| 6 | 3548836819 |
| 7 | 14877590196755 |
| 8 | 246614610741341843 |
| 9 | 16256896431763117598611 |
| 10 | 4274137206973266943778085267 |
| 11 | 4488323837657412597958687922896275 |
| 12 | 18839183877670041942218307147122500601235 |