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 | 2 |
| 2 | 8 |
| 3 | 16 |
| 4 | 80 |
| 5 | 160 |
| 6 | 640 |
| 7 | 2784 |
| 8 | 6560 |
| 9 | 21824 |
| 10 | 65280 |
| 11 | 131072 |
| 12 | 524800 |
| 13 | 1056192 |
| 14 | 4201728 |
| 15 | 8408000 |
| 16 | 43046720 |
| 17 | 86135424 |
| 18 | 361186816 |
| 19 | 1467183104 |
| 20 | 3443838080 |
| 21 | 11367226112 |
| 22 | 32550397696 |
| 23 | 70111011712 |
| 24 | 282403304960 |
| 25 | 569106797952 |