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 | 1 |
| 2 | 3 |
| 3 | 34 |
| 4 | 813 |
| 5 | 40242 |
| 6 | 4190533 |
| 7 | 920432562 |
| 8 | 427529873959 |
| 9 | 420708712370442 |
| 10 | 878018029249193808 |
| 11 | 3889681900917706414509 |
| 12 | 36599212212994279601355491 |
| 13 | 731787586726658710118188021426 |