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 | 12 |
| 2 | 92 |
| 3 | 800 |
| 4 | 7554 |
| 5 | 75664 |
| 6 | 792448 |
| 7 | 8595120 |
| 8 | 95895816 |
| 9 | 1095130728 |
| 10 | 12753454896 |
| 11 | 151017596448 |
| 12 | 1814135701956 |
| 13 | 22067487234504 |
| 14 | 271407264938656 |
| 15 | 3370796862212944 |
| 16 | 42230992336570032 |
| 17 | 533252038221313888 |
| 18 | 6781213722509638192 |
| 19 | 86790636905453265216 |