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) |
|---|---|
| 3 | 5 |
| 4 | 11 |
| 5 | 19 |
| 6 | 569 |
| 7 | 523 |
| 8 | 10103 |
| 9 | 207593 |
| 10 | 23456789 |
| 11 | 23581073 |
| 12 | 6609635987 |
| 13 | 12445558319 |
| 14 | 646972529377 |
| 15 | 19199908193159 |
| 16 | 9927935178558959 |
| 17 | 694140212317957 |
| 18 | 14707209648376466477 |
| 19 | 17758293160466332549 |
| 20 | 1450505927977839335179 |
| 21 | 96209320840499118292907 |
| 22 | 35191494265562720310441017 |