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 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 115 |
| 4 | 3451 |
| 5 | 164731 |
| 6 | 11467387 |
| 7 | 1096832395 |
| 8 | 138027417451 |
| 9 | 22111390122811 |
| 10 | 4393756903239067 |
| 11 | 1060590528331645675 |
| 12 | 305686632592587314251 |
| 13 | 103695663062502304228891 |
| 14 | 40895823706632785802087547 |
| 15 | 18554695374154504939196298955 |
| 16 | 9596336362873294022956267703851 |