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 | 0 |
| 8 | 1 |
| 9 | 3 |
| 10 | 5 |
| 11 | 9 |
| 12 | 26 |
| 13 | 65 |
| 14 | 193 |
| 15 | 632 |
| 16 | 2173 |
| 17 | 8049 |
| 18 | 31690 |
| 19 | 130773 |
| 20 | 563849 |
| 21 | 2525348 |
| 22 | 11702264 |
| 23 | 55948154 |
| 24 | 275331956 |
| 25 | 1392136462 |
| 26 | 7221272289 |
| 27 | 38380011748 |
| 28 | 208778309856 |