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 | 5 |
| 2 | 57 |
| 3 | 352 |
| 4 | 1280 |
| 5 | 3522 |
| 6 | 7970 |
| 7 | 15872 |
| 8 | 29184 |
| 9 | 49410 |
| 10 | 79042 |
| 11 | 122400 |
| 12 | 180224 |
| 13 | 257314 |
| 14 | 362340 |
| 15 | 492032 |
| 16 | 655360 |
| 17 | 867588 |
| 18 | 1117314 |
| 19 | 1420320 |
| 20 | 1803264 |
| 21 | 2237380 |
| 22 | 2745154 |
| 23 | 3380736 |
| 24 | 4080640 |
| 25 | 4881250 |
| 26 | 5874150 |
| 27 | 6928416 |
| 28 | 8126464 |
| 29 | 9600870 |
| 30 | 11133604 |