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 | 2 |
| 3 | 4 |
| 4 | 10 |
| 5 | 18 |
| 6 | 42 |
| 7 | 78 |
| 8 | 168 |
| 9 | 328 |
| 10 | 672 |
| 11 | 1324 |
| 12 | 2706 |
| 13 | 5354 |
| 14 | 10788 |
| 15 | 21518 |
| 16 | 43194 |
| 17 | 86208 |
| 18 | 172792 |
| 19 | 345208 |
| 20 | 691118 |
| 21 | 1381616 |
| 22 | 2764476 |
| 23 | 5527626 |
| 24 | 11058184 |
| 25 | 22113454 |
| 26 | 44232246 |
| 27 | 88459468 |
| 28 | 176929482 |
| 29 | 353848086 |
| 30 | 707718428 |
| 31 | 1415414600 |
| 32 | 2830872574 |
| 33 | 5661703102 |
| 34 | 11323491086 |