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 | 12 |
| 2 | 80 |
| 3 | 624 |
| 4 | 3760 |
| 5 | 25002 |
| 6 | 171068 |
| 7 | 1107888 |
| 8 | 7411872 |
| 9 | 50469114 |
| 10 | 335270710 |
| 11 | 2266967088 |
| 12 | 15497479060 |
| 13 | 104719636176 |
| 14 | 715192200880 |
| 15 | 4919017621164 |
| 16 | 33647413101184 |
| 17 | 231673960276602 |
| 18 | 1602349695229334 |
| 19 | 11054192845643568 |