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 | 1 |
| 8 | 1 |
| 9 | 14 |
| 10 | 30 |
| 11 | 88 |
| 12 | 929 |
| 13 | 989 |
| 14 | 3859 |
| 15 | 16557 |
| 16 | 35017 |
| 17 | 46506 |
| 18 | 256901 |
| 19 | 256721 |
| 20 | 1286189 |
| 21 | 2306003 |