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 | 8 |
| 2 | 31 |
| 3 | 132 |
| 4 | 573 |
| 5 | 2441 |
| 6 | 10485 |
| 7 | 44951 |
| 8 | 192730 |
| 9 | 826498 |
| 10 | 3544082 |
| 11 | 15198081 |
| 12 | 65172170 |
| 13 | 279476178 |
| 14 | 1198478073 |
| 15 | 5139392105 |
| 16 | 22039266498 |
| 17 | 94511169171 |
| 18 | 405291983276 |
| 19 | 1738017670081 |
| 20 | 7453162043129 |
| 21 | 31961457203015 |
| 22 | 137060728087293 |