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 | 2 |
| 1 | 6 |
| 2 | 38 |
| 3 | 234 |
| 4 | 1442 |
| 5 | 8886 |
| 6 | 54758 |
| 7 | 337434 |
| 8 | 2079362 |
| 9 | 12813606 |
| 10 | 78960998 |
| 11 | 486579594 |
| 12 | 2998438562 |
| 13 | 18477210966 |
| 14 | 113861704358 |
| 15 | 701647437114 |
| 16 | 4323746327042 |
| 17 | 26644125399366 |
| 18 | 164188498723238 |
| 19 | 1011775117738794 |