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) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 2 |
| 11 | 41 |
| 12 | 262 |
| 13 | 1340 |
| 14 | 5359 |
| 15 | 19210 |
| 16 | 60150 |
| 17 | 172234 |
| 18 | 460553 |
| 19 | 1159167 |
| 20 | 2774702 |
| 21 | 6363475 |
| 22 | 14056367 |