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 | 1504 |
| 2 | 30592 |
| 3 | 4526272 |
| 4 | 8353792 |
| 5 | 361702144 |
| 6 | 1081850752 |
| 7 | 1845991216 |
| 8 | 2146926592 |
| 9 | 21818579968 |
| 10 | 34357510144 |
| 11 | 228354264064 |
| 12 | 549746900992 |
| 13 | 2169800814592 |
| 14 | 8796057370624 |
| 15 | 24038405705152 |
| 16 | 80952364306432 |
| 17 | 140737345748992 |
| 18 | 2737658648639872 |
| 19 | 23810602502029312 |
| 20 | 36979953305070592 |