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 | 73 |
| 2 | 757 |
| 3 | 1772893 |
| 4 | 48551233240513 |
| 5 | 378890487846991 |
| 6 | 3156404483062657 |
| 7 | 17390284913300671 |
| 8 | 280343912759041771 |
| 9 | 319913861581383373 |
| 10 | 487014306953858713 |
| 11 | 7824668707707203971 |
| 12 | 8443914727229480773 |
| 13 | 32564717507686012813 |
| 14 | 48095468363380957093 |
| 15 | 54811417636756749151 |