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 | 1024 |
| 1 | 248832 |
| 2 | 3200000 |
| 3 | 17210368 |
| 4 | 60466176 |
| 5 | 164916224 |
| 6 | 380204032 |
| 7 | 777600000 |
| 8 | 1453933568 |
| 9 | 2535525376 |
| 10 | 4182119424 |
| 11 | 6590815232 |
| 12 | 10000000000 |
| 13 | 14693280768 |
| 14 | 21003416576 |
| 15 | 29316250624 |
| 16 | 40074642432 |
| 17 | 53782400000 |
| 18 | 71008211968 |
| 19 | 92389579776 |
| 20 | 118636749824 |
| 21 | 150536645632 |
| 22 | 188956800000 |