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 | 3 |
| 7 | 4 |
| 8 | 37 |
| 9 | 52 |
| 10 | 342 |
| 11 | 502 |
| 12 | 2836 |
| 13 | 4343 |
| 14 | 22622 |
| 15 | 35405 |
| 16 | 176176 |
| 17 | 281141 |
| 18 | 1363112 |
| 19 | 2205171 |
| 20 | 10527712 |
| 21 | 17221126 |
| 22 | 81462884 |
| 23 | 134424679 |
| 24 | 632308448 |