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 | 8 |
| 3 | 18 |
| 4 | 40 |
| 5 | 84 |
| 6 | 162 |
| 7 | 321 |
| 8 | 649 |
| 9 | 1286 |
| 10 | 2550 |
| 11 | 5096 |
| 12 | 10188 |
| 13 | 20406 |
| 14 | 40883 |
| 15 | 81932 |
| 16 | 164190 |
| 17 | 328490 |
| 18 | 657509 |
| 19 | 1316258 |
| 20 | 2635513 |
| 21 | 5276876 |
| 22 | 10565366 |
| 23 | 21155215 |
| 24 | 42355195 |
| 25 | 84797387 |
| 26 | 169759097 |