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) |
|---|---|
| 6 | 1 |
| 7 | 4 |
| 8 | 17 |
| 9 | 60 |
| 10 | 209 |
| 11 | 685 |
| 12 | 2204 |
| 13 | 6913 |
| 14 | 21387 |
| 15 | 65241 |
| 16 | 197104 |
| 17 | 590284 |
| 18 | 1755804 |
| 19 | 5191723 |
| 20 | 15276610 |
| 21 | 44761350 |
| 22 | 130682371 |
| 23 | 380337474 |
| 24 | 1103927291 |
| 25 | 3196494453 |