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 | 3 |
| 2 | 5 |
| 3 | 7 |
| 4 | 1201 |
| 5 | 13421 |
| 6 | 28393 |
| 7 | 22796593 |
| 8 | 563377 |
| 9 | 1117 |
| 10 | 470925821 |
| 11 | 1048563011 |
| 12 | 3512477579761 |
| 13 | 644522798011 |
| 14 | 22021301 |
| 15 | 24317675453761 |
| 16 | 14189041365214758401 |
| 17 | 21199857783625129028395239857 |
| 18 | 13842121 |
| 19 | 292354984050175817 |
| 20 | 613624820402521 |