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 | 4 |
| 1 | 1 |
| 2 | 105 |
| 3 | 385 |
| 4 | 1365 |
| 5 | 2145 |
| 6 | 2805 |
| 7 | 3135 |
| 8 | 6545 |
| 9 | 7917 |
| 10 | 10465 |
| 11 | 10465 |
| 12 | 10465 |
| 13 | 10465 |
| 14 | 10465 |
| 15 | 11305 |
| 16 | 11305 |
| 17 | 11305 |
| 18 | 11305 |
| 19 | 11305 |
| 20 | 11305 |
| 21 | 11305 |
| 22 | 15015 |
| 23 | 17255 |
| 24 | 17255 |
| 25 | 17255 |
| 26 | 20615 |
| 27 | 25935 |
| 28 | 26565 |
| 29 | 26565 |
| 30 | 26565 |
| 31 | 26565 |
| 32 | 26565 |
| 33 | 26565 |
| 34 | 26565 |
| 35 | 26565 |
| 36 | 26565 |
| 37 | 26565 |
| 38 | 26565 |
| 39 | 26565 |
| 40 | 26565 |
| 41 | 26565 |