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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 7 |
| 7 | 9 |
| 8 | 12 |
| 9 | 21 |
| 10 | 114 |
| 11 | 200 |
| 12 | 351 |
| 13 | 465 |
| 14 | 4410 |
| 15 | 31572 |
| 16 | 170625 |
| 17 | 11584946 |
| 18 | 35676949 |
| 19 | 786584466 |
| 20 | 40315615410 |
| 21 | 14793304131648 |
| 22 | 105908093453250 |
| 23 | 140298353215075 |
| 24 | 5232446865180756766896 |
| 25 | 65737871451481911585400 |