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 | 7 |
| 2 | 31 |
| 3 | 1231 |
| 4 | 4231 |
| 5 | 366031 |
| 6 | 819031 |
| 7 | 1155631 |
| 8 | 1311031 |
| 9 | 1575031 |
| 10 | 3822031 |
| 11 | 4389031 |
| 12 | 4515631 |
| 13 | 5880631 |
| 14 | 7102231 |
| 15 | 9333031 |
| 16 | 9954031 |
| 17 | 13213231 |
| 18 | 13432231 |
| 19 | 16120231 |
| 20 | 19140631 |
| 21 | 25654231 |
| 22 | 34987231 |
| 23 | 37393231 |
| 24 | 38875231 |
| 25 | 39375631 |
| 26 | 41152231 |
| 27 | 47955631 |
| 28 | 52345231 |
| 29 | 53655631 |
| 30 | 62647231 |
| 31 | 67486231 |