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 | 30 |
| 2 | 2046 |
| 3 | 245760 |
| 4 | 301056 |
| 5 | 450560 |
| 6 | 1171456 |
| 7 | 1351680 |
| 8 | 3514368 |
| 9 | 14515200 |
| 10 | 16760832 |
| 11 | 19611648 |
| 12 | 77220864 |
| 13 | 159373824 |
| 14 | 357291648 |
| 15 | 391444480 |
| 16 | 477216768 |
| 17 | 555714432 |
| 18 | 754928640 |
| 19 | 765414240 |
| 20 | 1006602240 |
| 21 | 1761500160 |
| 22 | 2330913312 |
| 23 | 4314834944 |
| 24 | 8369053056 |
| 25 | 20449394784 |
| 26 | 37949317120 |