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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 34 |
| 5 | 5 |
| 6 | 10946 |
| 7 | 377 |
| 8 | 8 |
| 9 | 89 |
| 10 | 610 |
| 11 | 17711 |
| 12 | 619220451666590135228675387863297874269396512 |
| 13 | 13 |
| 14 | 70492524767089125814114 |
| 15 | 659034621587630041982498215 |
| 16 | 57602132235424755886206198685365216 |
| 17 | 24157817 |
| 18 | 196418 |
| 19 | 114059301025943970552219 |
| 20 | 1548008755920 |