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 | 1 |
| 2 | 2 |
| 3 | 12 |
| 4 | 21 |
| 5 | 38 |
| 6 | 1188 |
| 7 | 20771 |
| 8 | 37962 |
| 9 | 3378512 |
| 10 | 11594538 |
| 11 | 65833989271 |
| 12 | 3798830532038 |
| 13 | 575684923751188 |
| 14 | 21079405433537116521 |
| 15 | 177324875114669443080086908188 |