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 | 345 |
| 4 | 690 |
| 5 | 47196 |
| 6 | 46248900 |
| 7 | 53262468 |
| 8 | 71315748 |
| 9 | 140553735 |
| 10 | 188194335 |
| 11 | 215515727 |
| 12 | 281107470 |
| 13 | 288564647 |
| 14 | 292978595 |
| 15 | 310129096 |
| 16 | 376388670 |
| 17 | 431031454 |
| 18 | 577129294 |
| 19 | 585957190 |
| 20 | 1474108335 |
| 21 | 2133051720 |
| 22 | 2489605188 |
| 23 | 2948216670 |
| 24 | 3270679304 |
| 25 | 4043104611 |
| 26 | 5142743032 |