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 | 2 |
| 2 | 6 |
| 3 | 28 |
| 4 | 127 |
| 5 | 810 |
| 6 | 5402 |
| 7 | 38807 |
| 8 | 291400 |
| 9 | 2274205 |
| 10 | 18200488 |
| 11 | 149091160 |
| 12 | 1243722370 |
| 13 | 10533150855 |
| 14 | 90350630388 |