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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 5050 |
| 5 | 5056 |
| 6 | 5064 |
| 7 | 40520 |
| 8 | 40696 |
| 9 | 630373 |
| 10 | 40348521 |
| 11 | 483383076 |
| 12 | 6302798387 |