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 | 1 |
| 2 | 7 |
| 3 | 17 |
| 4 | 109 |
| 5 | 281 |
| 6 | 1669 |
| 7 | 6592663 |
| 8 | 16899113 |
| 9 | 16899145 |
| 10 | 16899295 |
| 11 | 749973611 |
| 12 | 5067034877 |
| 13 | 5067034925 |
| 14 | 34487825911 |
| 15 | 1626582230375 |