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 | 16418 |
| 2 | 134003 |
| 3 | 1904835 |
| 4 | 6716019 |
| 5 | 30735939 |
| 6 | 76010259 |
| 7 | 219219339 |
| 8 | 789905091 |
| 9 | 1630362891 |
| 10 | 4048053411 |
| 11 | 8203334331 |
| 12 | 13637193699 |
| 13 | 21850682619 |
| 14 | 39264939507 |
| 15 | 75124110099 |
| 16 | 115865269131 |
| 17 | 184159290171 |
| 18 | 270079040451 |
| 19 | 369892892379 |