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) |
|---|---|
| 10 | 7 |
| 11 | 1422 |
| 12 | 61966 |
| 13 | 1419901 |
| 14 | 22720053 |
| 15 | 288205741 |
| 16 | 3105573804 |
| 17 | 29654436325 |
| 18 | 258037473373 |
| 19 | 2086374808221 |
| 20 | 15899245803550 |
| 21 | 115413232143719 |
| 22 | 804608004076949 |
| 23 | 5421939004211551 |
| 24 | 35497436998569721 |
| 25 | 226735499246904329 |
| 26 | 1417770877081098164 |
| 27 | 8703370306993200829 |