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) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 13 |
| 3 | 12 |
| 4 | 169 |
| 5 | 312 |
| 6 | 2341 |
| 7 | 6084 |
| 8 | 34177 |
| 9 | 107184 |
| 10 | 517309 |
| 11 | 1803516 |
| 12 | 8011225 |
| 13 | 29653416 |
| 14 | 125788117 |
| 15 | 481629108 |
| 16 | 1991086513 |
| 17 | 7770635808 |
| 18 | 31663673965 |
| 19 | 124911303660 |
| 20 | 504875391241 |
| 21 | 2003811035160 |
| 22 | 8062315730053 |
| 23 | 32108048151972 |
| 24 | 128855836912609 |
| 25 | 514152414736272 |
| 26 | 2060422457687581 |