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 | 83 |
| 7 | 6107 |
| 8 | 126376 |
| 9 | 1377328 |
| 10 | 9984758 |
| 11 | 54399330 |
| 12 | 239675936 |
| 13 | 895773148 |
| 14 | 2935757573 |
| 15 | 8641608781 |
| 16 | 23259768860 |
| 17 | 58039719112 |
| 18 | 135720432200 |
| 19 | 299995484600 |
| 20 | 631220344328 |
| 21 | 1271607596876 |
| 22 | 2464466665667 |
| 23 | 4613731163831 |
| 24 | 8372196591052 |
| 25 | 14769606793684 |
| 26 | 25395151577010 |