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 | 2 |
| 3 | 3 |
| 4 | 16 |
| 5 | 25 |
| 6 | 9 |
| 7 | 3577 |
| 8 | 2944 |
| 9 | 15741 |
| 10 | 26575 |
| 11 | 4495513 |
| 12 | 12504 |
| 13 | 56280729661 |
| 14 | 44436679 |
| 15 | 29505985 |
| 16 | 63813303296 |
| 17 | 10004122565473 |
| 18 | 6162434073 |
| 19 | 965843331633293 |
| 20 | 167791152125 |
| 21 | 3181977977743649 |
| 22 | 506778072148248857 |
| 23 | 27256898762578419475451 |
| 24 | 585293809045696 |