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 | 100 |
| 2 | 5000 |
| 3 | 166700 |
| 4 | 4170000 |
| 5 | 83500020 |
| 6 | 1394447000 |
| 7 | 19980314300 |
| 8 | 250799764000 |
| 9 | 2802204288900 |
| 10 | 28222682700200 |
| 11 | 258862555329100 |
| 12 | 2180706863326000 |
| 13 | 16993705726247700 |
| 14 | 123252789641763000 |