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 | 0 |
| 7 | 1 |
| 8 | 127 |
| 9 | 3025 |
| 10 | 34105 |
| 11 | 246730 |
| 12 | 1323652 |
| 13 | 5715424 |
| 14 | 20912320 |
| 15 | 67128490 |
| 16 | 193754990 |
| 17 | 512060978 |
| 18 | 1256328866 |
| 19 | 2892439160 |
| 20 | 6302524580 |
| 21 | 13087462580 |
| 22 | 26046574004 |
| 23 | 49916988803 |
| 24 | 92484925445 |
| 25 | 166218969675 |
| 26 | 290622864675 |
| 27 | 495564056130 |
| 28 | 825906183960 |
| 29 | 1347860993700 |