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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 1 |
| 10 | 1 |
| 11 | 6 |
| 12 | 94 |
| 13 | 10786 |
| 14 | 3459386 |
| 15 | 1470293676 |
| 16 | 733351105935 |
| 17 | 423187422492342 |
| 18 | 281341168330848873 |
| 19 | 214755319657939505395 |
| 20 | 187549729101764460261498 |
| 21 | 186685399408147545744203815 |
| 22 | 210977245260028917322933154987 |