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) |
|---|---|
| 2 | 2 |
| 3 | 34 |
| 4 | 546 |
| 5 | 8738 |
| 6 | 139810 |
| 7 | 2236962 |
| 8 | 35791394 |
| 9 | 572662306 |
| 10 | 9162596898 |
| 11 | 146601550370 |
| 12 | 2345624805922 |
| 13 | 37529996894754 |
| 14 | 600479950316066 |
| 15 | 9607679205057058 |
| 16 | 153722867280912930 |
| 17 | 2459565876494606882 |