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 | 10 |
| 3 | 32 |
| 4 | 112 |
| 5 | 412 |
| 6 | 1572 |
| 7 | 6148 |
| 8 | 24494 |
| 9 | 98992 |
| 10 | 404650 |
| 11 | 1669496 |
| 12 | 6941226 |
| 13 | 29047568 |
| 14 | 122235518 |
| 15 | 516860460 |
| 16 | 2194691988 |
| 17 | 9353657788 |