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) |
|---|---|
| 4 | 1 |
| 5 | 1 |
| 6 | 6 |
| 7 | 7 |
| 8 | 28 |
| 9 | 36 |
| 10 | 120 |
| 11 | 165 |
| 12 | 495 |
| 13 | 716 |
| 14 | 2003 |
| 15 | 3018 |
| 16 | 8024 |
| 17 | 12512 |
| 18 | 31977 |
| 19 | 51357 |
| 20 | 127110 |
| 21 | 209475 |
| 22 | 504736 |
| 23 | 850840 |
| 24 | 2003784 |
| 25 | 3445885 |
| 26 | 7956715 |
| 27 | 13926276 |
| 28 | 31609071 |
| 29 | 56191734 |
| 30 | 125640180 |
| 31 | 226444616 |
| 32 | 499685777 |
| 33 | 911607609 |
| 34 | 1988440598 |