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 | 5 |
| 3 | 36 |
| 4 | 480 |
| 5 | 9991 |
| 6 | 296913 |
| 7 | 12099604 |
| 8 | 637590728 |
| 9 | 43090005714 |
| 10 | 3550491371994 |
| 11 | 359557627057876 |