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 | 3 |
| 2 | 13 |
| 3 | 73 |
| 4 | 433 |
| 5 | 2593 |
| 6 | 120932353 |
| 7 | 725594113 |
| 8 | 33853318889473 |
| 9 | 7312316880125953 |
| 10 | 12281884428929630994433 |
| 11 | 160409934466124808814066151718913 |
| 12 | 44904515414709114480174422247585349633 |
| 13 | 452534055376752384160395854386801887645007873 |