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 | 2 |
| 2 | 10 |
| 3 | 86 |
| 4 | 838 |
| 5 | 6870 |
| 6 | 62398 |
| 7 | 613950 |
| 8 | 6018166 |
| 9 | 59293518 |
| 10 | 601267870 |
| 11 | 6215708078 |
| 12 | 64727555230 |
| 13 | 679456522670 |
| 14 | 7200537529326 |
| 15 | 76879249259246 |
| 16 | 825573117666246 |
| 17 | 8913831877350462 |
| 18 | 96733061472889806 |
| 19 | 1054372579551732366 |