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 | 11 |
| 2 | 37 |
| 3 | 271 |
| 4 | 4649 |
| 5 | 513239 |
| 6 | 265371653 |
| 7 | 5363222357 |
| 8 | 1111111111111111111 |
| 9 | 11111111111111111111111 |
| 10 | 77843839397 |
| 11 | 57336415063790604359 |
| 12 | 2212394296770203368013 |
| 13 | 201763709900322803748657942361 |