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 | 16 |
| 2 | 352 |
| 3 | 3376 |
| 4 | 19648 |
| 5 | 82256 |
| 6 | 273440 |
| 7 | 767600 |
| 8 | 1894784 |
| 9 | 4228752 |
| 10 | 8703712 |
| 11 | 16763824 |
| 12 | 30549568 |
| 13 | 53125072 |
| 14 | 88750496 |
| 15 | 143203568 |
| 16 | 224154368 |
| 17 | 341597456 |
| 18 | 508345440 |
| 19 | 740588080 |
| 20 | 1058521024 |
| 21 | 1487048272 |