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 | 2 |
| 2 | 12 |
| 3 | 71 |
| 4 | 361 |
| 5 | 1748 |
| 6 | 8007 |
| 7 | 35513 |
| 8 | 153450 |
| 9 | 651075 |
| 10 | 2723829 |
| 11 | 11275932 |
| 12 | 46302339 |
| 13 | 188958191 |
| 14 | 767474182 |
| 15 | 3105857015 |