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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 7 |
| 6 | 14 |
| 7 | 36 |
| 8 | 137 |
| 9 | 929 |
| 10 | 13239 |
| 11 | 464515 |
| 12 | 50460440 |
| 13 | 22591114885 |
| 14 | 60828726553214 |
| 15 | 1596736103217310005 |
| 16 | 758951202691072926415726 |
| 17 | 14362612850483065758193194817954 |