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 | 1245335 |
| 2 | 318047135 |
| 3 | 358491735 |
| 4 | 533718135 |
| 5 | 709131500 |
| 6 | 1122571695 |
| 7 | 1814416175 |
| 8 | 3565970135 |
| 9 | 4486354631 |
| 10 | 14336906175 |
| 11 | 14827262351 |
| 12 | 22805269551 |
| 13 | 36360557831 |
| 14 | 43971297884 |
| 15 | 72370166375 |
| 16 | 99254203895 |
| 17 | 102204949847 |
| 18 | 145262865020 |
| 19 | 156161459559 |
| 20 | 173741271935 |
| 21 | 231267964895 |