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 | 4 |
| 2 | 6 |
| 3 | 10 |
| 4 | 18 |
| 5 | 42 |
| 6 | 78 |
| 7 | 94 |
| 8 | 114 |
| 9 | 190 |
| 10 | 322 |
| 11 | 546 |
| 12 | 3894 |
| 13 | 10318 |
| 14 | 11650 |
| 15 | 12474 |
| 16 | 20994 |
| 17 | 61810 |
| 18 | 103882 |
| 19 | 296010 |
| 20 | 636930 |
| 21 | 653638 |
| 22 | 926766 |