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) |
|---|---|
| 1 | 3 |
| 2 | 33 |
| 3 | 30 |
| 4 | 330 |
| 5 | 3570 |
| 6 | 30030 |
| 7 | 3008460 |
| 8 | 30120090 |
| 9 | 300690390 |
| 10 | 30043474230 |
| 11 | 304075581810 |
| 12 | 30035662366710 |
| 13 | 304250263527210 |
| 14 | 30078810535603830 |
| 15 | 3001252188252588270 |
| 16 | 32589158477190044730 |
| 17 | 3003056284355533696290 |