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) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 3 |
| 3 | 7 |
| 4 | 26 |
| 5 | 141 |
| 6 | 1034 |
| 7 | 9693 |
| 8 | 111522 |
| 9 | 1528112 |
| 10 | 24372513 |
| 11 | 444461496 |
| 12 | 9135985760 |
| 13 | 209223309377 |
| 14 | 5286985099830 |
| 15 | 146225910921737 |
| 16 | 4395973641599418 |
| 17 | 142794782804641965 |
| 18 | 4985911547339049132 |
| 19 | 186284207595651780174 |