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 | 480 |
| 2 | 29152 |
| 3 | 525952 |
| 4 | 3994080 |
| 5 | 18626112 |
| 6 | 67978880 |
| 7 | 197120256 |
| 8 | 509145568 |
| 9 | 1143441760 |
| 10 | 2428524096 |
| 11 | 4658843520 |
| 12 | 8705492608 |
| 13 | 15000919872 |
| 14 | 25593401600 |
| 15 | 40864033536 |
| 16 | 65187410400 |
| 17 | 98098623936 |
| 18 | 148724365664 |
| 19 | 213678303360 |
| 20 | 310833534528 |
| 21 | 430766443520 |
| 22 | 605650030464 |
| 23 | 813970121472 |