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) |
|---|---|
| 7 | 272 |
| 8 | 7936 |
| 9 | 137216 |
| 10 | 1841152 |
| 11 | 21253376 |
| 12 | 222398464 |
| 13 | 2174832640 |
| 14 | 20261765120 |
| 15 | 182172651520 |
| 16 | 1594922762240 |
| 17 | 13684856848384 |
| 18 | 115620218667008 |
| 19 | 965271355195392 |
| 20 | 7984436548730880 |
| 21 | 65569731961159680 |
| 22 | 535438370914959360 |
| 23 | 4353038473793372160 |
| 24 | 35266789418949672960 |