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 | 14 |
| 3 | 294 |
| 4 | 8232 |
| 5 | 288120 |
| 6 | 12101040 |
| 7 | 592950960 |
| 8 | 33205253760 |
| 9 | 2091930986880 |
| 10 | 146435169081600 |
| 11 | 11275508019283200 |
| 12 | 947142673619788800 |
| 13 | 86189983299400780800 |
| 14 | 8446618363341276518400 |
| 15 | 886894928150834034432000 |
| 16 | 99332231952893411856384000 |
| 17 | 11820535602394316010909696000 |