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 | 4 |
| 3 | 96 |
| 4 | 5888 |
| 5 | 686080 |
| 6 | 130179072 |
| 7 | 36590059520 |
| 8 | 14290429935616 |
| 9 | 7405376630685696 |
| 10 | 4917457306800619520 |
| 11 | 4071967909087792857088 |
| 12 | 4113850542422629363482624 |
| 13 | 4980673081258443273955966976 |
| 14 | 7119048451600750435732824260608 |
| 15 | 11861520124846917915630931846103040 |