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 | 48 |
| 2 | 72 |
| 3 | 1992 |
| 4 | 2232 |
| 5 | 2616 |
| 6 | 2856 |
| 7 | 7488 |
| 8 | 9992 |
| 9 | 10712 |
| 10 | 11432 |
| 11 | 13736 |
| 12 | 53712 |
| 13 | 57432 |
| 14 | 66216 |
| 15 | 73056 |
| 16 | 249992 |
| 17 | 272312 |
| 18 | 284832 |
| 19 | 287432 |
| 20 | 347336 |
| 21 | 349936 |
| 22 | 6249992 |
| 23 | 8687336 |
| 24 | 8785936 |
| 25 | 9236656 |
| 26 | 45781056 |
| 27 | 45874056 |
| 28 | 46264656 |
| 29 | 170312312 |
| 30 | 178124832 |