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 | 5 |
| 3 | 34 |
| 4 | 326 |
| 5 | 3988 |
| 6 | 59605 |
| 7 | 1052849 |
| 8 | 21460092 |
| 9 | 495764693 |
| 10 | 12800845442 |
| 11 | 365323615365 |
| 12 | 11419131242071 |
| 13 | 387977390372850 |
| 14 | 14236659589753581 |
| 15 | 561109543344974894 |
| 16 | 23640346895461300427 |
| 17 | 1060265646084471617079 |
| 18 | 50434955069054663240727 |