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 | 1 |
| 3 | 7 |
| 4 | 17 |
| 5 | 209 |
| 6 | 25 |
| 7 | 37 |
| 8 | 281 |
| 9 | 9797 |
| 10 | 92711 |
| 11 | 120011 |
| 12 | 1589737 |
| 13 | 2027317 |
| 14 | 30861373 |
| 15 | 38322673 |
| 16 | 735926129 |
| 17 | 6107595203 |
| 18 | 5188977503 |
| 19 | 6040786643 |
| 20 | 5218865543 |
| 21 | 174771852097 |
| 22 | 4738609625857 |
| 23 | 5386574286277 |
| 24 | 4776172794577 |
| 25 | 197777244862999 |