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 | 2 |
| 2 | 514 |
| 3 | 39368 |
| 4 | 10601986 |
| 5 | 2003906252 |
| 6 | 588906874144 |
| 7 | 159219918144128 |
| 8 | 51207103076632066 |
| 9 | 16425660314368351892 |
| 10 | 5697191745563573732764 |
| 11 | 2010823973962863400708688 |
| 12 | 739753103704422167184400096 |
| 13 | 277511604090132008416695054272 |
| 14 | 106814999715696983804826836579584 |