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 | 5310721 |
| 2 | 2278677961 |
| 3 | 9593125081 |
| 4 | 29859667201 |
| 5 | 467593730289953281 |
| 6 | 98538479002618905601 |
| 7 | 146842414757227736821 |