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 | 9 |
| 4 | 109 |
| 5 | 141 |
| 6 | 10583 |
| 7 | 34641 |
| 8 | 44510583 |
| 9 | 105741141 |
| 10 | 942926927083 |
| 11 | 4346471925583 |
| 12 | 2969848344609859 |