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 | 18 |
| 4 | 131 |
| 5 | 1111 |
| 6 | 10461 |
| 7 | 105819 |
| 8 | 1127413 |
| 9 | 12499673 |
| 10 | 143021541 |
| 11 | 1678718575 |
| 12 | 20123155604 |
| 13 | 245521479531 |
| 14 | 3041006378312 |
| 15 | 38157059717410 |
| 16 | 484209044329613 |
| 17 | 6205758830280388 |
| 18 | 80235572611152385 |