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 | 14 |
| 3 | 86 |
| 4 | 374 |
| 5 | 1382 |
| 6 | 4694 |
| 7 | 15206 |
| 8 | 47894 |
| 9 | 148262 |
| 10 | 453974 |
| 11 | 1380326 |
| 12 | 4177814 |
| 13 | 12607142 |
| 14 | 37968854 |
| 15 | 114201446 |
| 16 | 343194134 |
| 17 | 1030762022 |
| 18 | 3094645334 |
| 19 | 9288654566 |
| 20 | 27875400854 |
| 21 | 83645076902 |
| 22 | 250972979414 |
| 23 | 752994435686 |
| 24 | 2259134301974 |