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 | 63973 |
| 2 | 192739365541 |
| 3 | 461574735553 |
| 4 | 10028704049893 |
| 5 | 84154807001953 |
| 6 | 197531244744661 |
| 7 | 973694665856161 |
| 8 | 3060522900274753 |
| 9 | 3183276534603733 |
| 10 | 11861640972220321 |
| 11 | 26862493078871893 |
| 12 | 51516243805731301 |
| 13 | 190276732600534693 |
| 14 | 245840587068477781 |
| 15 | 386096840467598593 |