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 | 0 |
| 1 | 17 |
| 2 | 1060 |
| 3 | 76127 |
| 4 | 5736396 |
| 5 | 454396537 |
| 6 | 37550402023 |
| 7 | 3203324994356 |
| 8 | 279209790387276 |
| 9 | 24739512092254535 |
| 10 | 2220822432581729238 |
| 11 | 201467077743744681014 |
| 12 | 18435588552550705911377 |
| 13 | 1699246443377779418889494 |
| 14 | 157589260710736940541561021 |
| 15 | 14692398516908006398225702366 |