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 | 7 |
| 1 | 1 |
| 2 | 43 |
| 3 | 229 |
| 4 | 1447 |
| 5 | 8881 |
| 6 | 54763 |
| 7 | 337429 |
| 8 | 2079367 |
| 9 | 12813601 |
| 10 | 78961003 |
| 11 | 486579589 |
| 12 | 2998438567 |
| 13 | 18477210961 |
| 14 | 113861704363 |
| 15 | 701647437109 |
| 16 | 4323746327047 |
| 17 | 26644125399361 |
| 18 | 164188498723243 |
| 19 | 1011775117738789 |
| 20 | 6234839205156007 |
| 21 | 38420810348674801 |
| 22 | 236759701297204843 |