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 | 7 |
| 2 | 84 |
| 3 | 1008 |
| 4 | 12096 |
| 5 | 145152 |
| 6 | 1741824 |
| 7 | 20901888 |
| 8 | 250822656 |
| 9 | 3009871872 |
| 10 | 36118462464 |
| 11 | 433421549568 |
| 12 | 5201058594816 |
| 13 | 62412703137792 |
| 14 | 748952437653504 |
| 15 | 8987429251842048 |
| 16 | 107849151022104576 |
| 17 | 1294189812265254912 |