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 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 92 |
| 9 | 1066 |
| 10 | 7828 |
| 11 | 44148 |
| 12 | 195270 |
| 13 | 707698 |
| 14 | 2211868 |
| 15 | 6120136 |
| 16 | 15324708 |
| 17 | 35312064 |
| 18 | 75937606 |
| 19 | 153942964 |
| 20 | 296590536 |
| 21 | 546621416 |
| 22 | 968910732 |
| 23 | 1659114170 |
| 24 | 2754780934 |
| 25 | 4449361442 |
| 26 | 7009572728 |
| 27 | 10796663102 |
| 28 | 16292133888 |