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 | 0 |
| 2 | 162 |
| 3 | 2327 |
| 4 | 3256 |
| 5 | 21361 |
| 6 | 236326 |
| 7 | 1716995 |
| 8 | 8688851 |
| 9 | 56229035 |
| 10 | 428784791 |
| 11 | 3021617644 |
| 12 | 19058753004 |
| 13 | 128800589241 |
| 14 | 899664264951 |
| 15 | 6188584855591 |
| 16 | 41513163165807 |
| 17 | 282748964373121 |
| 18 | 1940464266658865 |
| 19 | 13278427810584311 |