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 | 0 |
| 2 | 1 |
| 3 | 87 |
| 4 | 349 |
| 5 | 436 |
| 6 | 785 |
| 7 | 1221 |
| 8 | 5669 |
| 9 | 296009 |
| 10 | 597687 |
| 11 | 893696 |
| 12 | 48857271 |
| 13 | 98608238 |
| 14 | 936331413 |
| 15 | 1034939651 |
| 16 | 3006210715 |
| 17 | 4041150366 |
| 18 | 11088511447 |
| 19 | 37306684707 |
| 20 | 458768727931 |
| 21 | 496075412638 |
| 22 | 954844140569 |
| 23 | 2405763693776 |
| 24 | 5766371528121 |
| 25 | 8172135221897 |