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 | 72 |
| 2 | 1204 |
| 3 | 27042 |
| 4 | 542112 |
| 5 | 10778640 |
| 6 | 210476400 |
| 7 | 4064720816 |
| 8 | 77785162880 |
| 9 | 1477636398784 |
| 10 | 27897108860960 |
| 11 | 523921783242624 |
| 12 | 9794822341611072 |
| 13 | 182387895832407680 |
| 14 | 3384281324193062016 |
| 15 | 62600172035227164032 |