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 | 9 |
| 3 | 229 |
| 4 | 32000 |
| 5 | 19114420 |
| 6 | 53786626921 |
| 7 | 690427159718433 |
| 8 | 40891433857372174697 |
| 9 | 11135886394033736561250816 |
| 10 | 13961976233873461322297385441657 |