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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 8 |
| 5 | 9 |
| 6 | 32 |
| 7 | 128 |
| 8 | 238 |
| 9 | 512 |
| 10 | 1012 |
| 11 | 2048 |
| 12 | 8192 |
| 13 | 15070 |
| 14 | 21658 |
| 15 | 32768 |
| 16 | 131072 |
| 17 | 383548 |
| 18 | 391612 |
| 19 | 524288 |