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 | 7 |
| 3 | 23 |
| 4 | 41 |
| 5 | 109 |
| 6 | 191 |
| 7 | 271 |
| 8 | 2791 |
| 9 | 11971 |
| 10 | 31771 |
| 11 | 190321 |
| 12 | 2080597 |
| 13 | 3545281 |
| 14 | 4022911 |
| 15 | 73189117 |
| 16 | 137568061 |
| 17 | 443571241 |
| 18 | 565822531 |
| 19 | 1160260711 |
| 20 | 1622723341 |
| 21 | 31552100581 |
| 22 | 81651092041 |
| 23 | 96736641541 |
| 24 | 1867622877121 |
| 25 | 5000346134911 |