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) |
|---|---|
| 3 | 6 |
| 4 | 42 |
| 5 | 342 |
| 6 | 3210 |
| 7 | 34326 |
| 8 | 413322 |
| 9 | 5544342 |
| 10 | 82077450 |
| 11 | 1330064406 |
| 12 | 23428165002 |
| 13 | 445828910742 |
| 14 | 9116951060490 |
| 15 | 199412878763286 |
| 16 | 4646087794988682 |
| 17 | 114884369365147542 |
| 18 | 3005053671533400330 |
| 19 | 82905724863616146966 |
| 20 | 2406054103612912660362 |
| 21 | 73277364784409578094742 |
| 22 | 2336825320400166931304970 |