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) |
|---|---|
| 23 | 1 |
| 24 | 24 |
| 25 | 300 |
| 26 | 2600 |
| 27 | 17550 |
| 28 | 98280 |
| 29 | 475020 |
| 30 | 2035800 |
| 31 | 7888725 |
| 32 | 28048800 |
| 33 | 92561040 |
| 34 | 286097760 |
| 35 | 834451800 |
| 36 | 2310789600 |
| 37 | 6107086800 |
| 38 | 15471286560 |
| 39 | 37711260990 |
| 40 | 88732378800 |
| 41 | 202112640600 |
| 42 | 446775310800 |
| 43 | 960566918220 |
| 44 | 2012616400080 |
| 45 | 4116715363800 |
| 46 | 8233430727600 |