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 | 0 |
| 9 | 0 |
| 10 | 32 |
| 11 | 552 |
| 12 | 4738 |
| 13 | 27110 |
| 14 | 119602 |
| 15 | 437640 |
| 16 | 1376504 |
| 17 | 3835578 |
| 18 | 9697416 |
| 19 | 22605024 |
| 20 | 49208658 |
| 21 | 101004522 |
| 22 | 197024206 |
| 23 | 367556982 |
| 24 | 659230078 |
| 25 | 1141734758 |
| 26 | 1916570390 |
| 27 | 3128196492 |
| 28 | 4978021504 |
| 29 | 7741704218 |
| 30 | 11790289180 |